Acoustical window assembly for vehicle

ABSTRACT

A window assembly for a vehicle includes a window panel, a frame portion and an actuating assembly. The frame portion is disposed partially around a perimeter of the window panel and not disposed at a free perimeter portion of the window panel. The actuating assembly is positioned at or near the free perimeter portion of the window panel and is operable to vibrate the window panel. The frame portion may fixedly secure a fixed perimeter portion of the window panel at the vehicle, and the fixed perimeter portion may be substantially opposite from the free perimeter portion. The window assembly is configured to allow flexing along other perimeter portions of the window panel between the fixed perimeter portion and the free perimeter portion.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. patent application,Ser. No. 12/741,676, filed May 6, 2010 (Attorney Docket MAGO6 P-14477),which is a 371 U.S. national phase filing of PCT Application No.PCT/US08/82583, filed Nov. 6, 2008, which claims the benefit of U.S.provisional application Ser. No. 60/985,801, filed Nov. 6, 2007, whichare hereby incorporated herein by reference in their entireties. Thepresent application is also a continuation-in-part of U.S. patentapplication Ser. No. 12/088,560, filed Mar. 28, 2008, now U.S. Pat. No.8,180,065, which is a 371 U.S. national phase application of PCTApplication No. PCT/US06/40100, filed Oct. 12, 2006, which claims thebenefit of U.S. provisional application, Ser. No. 60/726,343, filed Oct.13, 2005.

FIELD OF THE INVENTION

The present invention relates to a window assembly for a vehicle and,more particularly, a window assembly that includes a perimeter frame anda window panel and that may be installed in a. vehicle as a unit or asseparate components.

BACKGROUND OF THE INVENTION

It is known to provide a window assembly in a vehicle that includes aperimeter frame that is mounted or attached to a vehicle in a variety ofways, such as by adhesive or fasteners or the like. The window assemblyis substantially sealed to the vehicle and around its perimeter edgeregions to limit leakage at the window.

Sound systems for vehicles have become increasingly complicated andsophisticated as vehicle owners desire enhanced sound quality in theirvehicles. However, vehicle manufacturers often encounter packagingdifficulties when attempting to fit large speakers, such as sub-woofersor the like, within the vehicle to provide the desired enhanced soundquality. It has been proposed to provide an audio speaker for a vehiclesound system by vibrating a panel of the vehicle, such as a window ortrim panel or the like of the vehicle. Such audio devices have had thevibrating device or actuator disposed directly at the panel, and thusare highly dependant on the precise location of the actuator at theglass, typically at a central region of-the panel or panel portion thatis to be vibrated, and are highly dependent on the resonant frequenciesof the panel.

SUMMARY OF THE INVENTION

The present invention provides a window assembly that includes atransparent glass window panel (or at least partially transparent ortranslucent, such as a tinted glass window panel or the like, or othertype of window panel, such as a polycarbonate or plastic or laminatewindow panel or the like) and an actuating device or actuating assemblyoperable to vibrate the window panel to produce audible sound for avehicle sound system, such as for a vehicle radio or CD player or atelematics system of the vehicle. The window assembly includes a framethat partially encompasses the perimeter of the window panel, wherebythe actuating assembly is positioned at or near a perimeter edge orregion of the window panel and functions to vibrate the window panel toproduce the desired acoustics or audible sound.

According to an aspect of the present invention, an acoustical windowassembly or glass panel speaker or window speaker includes a windowpanel or transparent panel, a first mounting portion for mounting afirst perimeter region of the window panel to a vehicle structure, asecond mounting portion for mounting a second perimeter region of thewindow panel to the vehicle structure, and an actuating assembly. Thefirst mounting portion substantially fixedly mounts the first perimeterregion of the window panel relative to the vehicle structure and thesecond mounting portion includes a flexible element to allow formovement of the second perimeter region of the window panel toward andaway from the vehicle structure. The actuating assembly is positioned atan actuating region of the window panel and has a substantially rigidinterface element engaging the actuating region of the window panel. Theactuating assembly is operable to vibrate the window panel via vibrationof the interface element relative to the vehicle structure.

Vibration of the window panel generates audible sounds when theactuating assembly is operated, so as to function as a speaker for thevehicle audio system or telematics system or the like. The window panelmay be vibrated at a frequency between about 20 Hz and about 200 Hz orthereabouts when the actuating assembly is operated to generate thedesired range of sounds. Optionally, the window panel may comprise anywindow of the vehicle, such as, for example, a rear window or backliteof a vehicle, a windshield of a vehicle, a side window of a vehicle, aside door window of a vehicle, a moonroof of a vehicle or a sunroof of avehicle. The present invention is particularly suitable for applicationat a fixed window of a vehicle, such as a windshield, rear backlite,side window, moonroof or the like. However, it is envisioned thataspects of the present invention may be suited for application atmovable windows as well, such as, for example, in liftgate windowapplications (such as, for example, conventional liftgates and/or glassliftgates with the hinges and latches and other hardware bonded to theglass or polycarbonate or laminate window panel) and sunroofapplications and/or the like,

The actuating assembly or actuator may comprise a piezoelectric actuatorthat functions to vibrate at or near the perimeter portion of the windowpanel. The piezoelectric actuator may function to excite an exciterdevice that converts the vibration of the actuator to the desiredvibration or movement at the window panel (such as a movement toward andaway from the window panel to impart the inward/outward movement orvibration of the window panel at the perimeter portion of the windowpanel). A perimeter seal along the frame portion or mounting portion ofthe window panel substantially seals the window panel at the vehicleduring the movement or vibration of the window panel.

The exciter device provides a substantially rigid interface at thewindow panel and at the vehicle frame or sheet metal to limit orsubstantially preclude flexing of the interface portions of the exciter.Thus, the actuator and exciter device function to provide substantiallyuniform or non. bending movement or vibration of the window panel withminimal flexing of the exciter and/or the perimeter portion of thewindow panel during operation of the actuator. Thus, the presentinvention avoids bending motion of the window panel during operation ofthe actuator.

According to another aspect of the present invention, a window assemblyfor a vehicle comprises:

a window panel having a first perimeter region and a second perimeterregion;

a first mounting portion for mounting said first perimeter region ofsaid window panel to a vehicle structure, said first mounting portionsubstantially fixedly mounting said first perimeter region of saidwindow panel relative to the vehicle structure;

a second mounting portion for mounting said second perimeter region ofsaid window panel to the vehicle structure, said second mounting portionincluding a flexible element to allow for movement of said secondperimeter region of said window panel toward and away from the vehiclestructure;

an actuating assembly, said actuating assembly positioned at anactuating region of said window panel, said actuating assembly operableto vibrate said window panel via vibration of an interface elementrelative to the vehicle structure; and

wherein said vibration of said window panel generates audible soundswhen said actuating assembly is operated, and wherein said window panelis vibrated at a frequency between about 20 Hz and 200 Hz when saidactuating assembly is operated.

According to another aspect of the present invention, a window assemblyfor a vehicle comprises:

a window panel having a first perimeter region and a second perimeterregion;

a first mounting portion for mounting said first perimeter region ofsaid window panel to a vehicle structure, said first mounting portionsubstantially fixedly mounting said first perimeter region of saidwindow panel relative to the vehicle structure;

a second mounting portion for mounting said second perimeter region ofsaid window panel to the vehicle structure, said second mounting portionincluding a flexible element to allow for movement of said secondperimeter region of said window panel toward and away from the vehiclestructure;

an actuating assembly, said actuating assembly being positioned at anactuating region of said window panel, said actuating assemblycomprising an actuating device and an exciter device, said exciterdevice comprising an interface element engaging said actuating region ofsaid window panel and a mounting element substantially fixedly securinga base portion of said exciter device to the vehicle structure;

wherein said actuating device is oriented to impart movement in adirection generally along a surface of said actuating region of saidwindow panel and said exciter device imparts movement in a directiongenerally normal to said surface of said actuating region of said windowpanel in response to actuation of said actuating device;

wherein said exciter device includes at least one biasing element thatexerts a preload force at opposite ends of said actuating device; and

wherein said actuating assembly is operable to vibrate said window panelvia vibration of said interface element relative to the vehiclestructure.

Optionally, the actuating assembly may comprise a piezoelectric actuatorthat is operable to vibrate said actuating region of said window panel.The exciter device may include at least one biasing element that exertsa preload force at opposite ends of said piezoelectric actuator.

According to another aspect of the present invention, a window assemblyfor a vehicle comprises:

a window panel having a first perimeter region and a second perimeterregion;

a first mounting portion for mounting said first perimeter region ofsaid window panel to a vehicle structure, said first mounting portionsubstantially fixedly mounting said first perimeter region of saidwindow panel relative to the vehicle structure;

a second mounting portion for mounting said second perimeter region ofsaid window panel to the vehicle structure, said second mounting portionincluding a flexible element to allow for movement of said secondperimeter region of said window panel toward and away from the vehiclestructure;

an actuating assembly, said actuating assembly being positioned at anactuating region of said window panel, said actuating assemblycomprising an actuating device and an exciter device, said exciterdevice comprising an interface element engaging said actuating region ofsaid window panel and a mounting element substantially fixedly securinga base portion of said exciter device to the vehicle structure;

wherein said exciter device comprises a movable rod interconnected withsaid mounting element and said interface element via a plurality of ribsarranged diagonally between said movable rod and said interface elementand said mounting element;

wherein said ribs have end sections generally parallel to said movablerod and said interface element and said mounting element, and whereinsaid ribs have bend portions at a junction between said end sections anda center section of said ribs that is diagonal to said movable rod andsaid interface element and said mounting element, and wherein saidcenter section of said ribs comprise at least one narrowed sectionestablished at said center section and remote from said bend portions,

wherein said narrowed section facilitates flexing of said rib duringoperation of said actuating device;

wherein said actuating device is oriented to impart movement in adirection generally along said surface of said actuating region of saidwindow panel and said exciter device imparts movement in a directiongenerally normal to said surface of said actuating region of said windowpanel in response to actuation of said actuating device; and

wherein said actuating assembly is operable to vibrate said window panelvia vibration of said interface element relative to the vehiclestructure.

Optionally, said actuating assembly may comprise a piezoelectricactuator that is operable to vibrate said actuating region of saidwindow panel.

According to another aspect of the present invention, a method ofmanufacturing a vibrating device for vibrating a window panel of avehicle comprises:

providing a first mounting portion for substantially fixedly mounting afirst perimeter region of said window panel to a vehicle structure, andproviding a second mounting portion for mounting a second perimeterregion of the window panel to the vehicle structure, said secondmounting portion including a flexible element to allow for movement ofthe second perimeter region of the window panel toward and away from thevehicle structure; and

providing an actuating assembly, said actuating assembly comprising anactuating device and an exciter device, said exciter device comprising awindow interface element for engaging an actuating region of a windowpanel when said actuating assembly is installed at a window panel of avehicle and a mounting element substantially fixedly securing a baseportion of said exciter device to the vehicle structure when saidactuating assembly is installed at a window panel of a vehicle;

forming a plurality of ribs for said exciter device by forming generallyparallel end sections and a center section between two bend portions ofsaid ribs, said center section being angled or diagonal to saidgenerally parallel end sections;

wherein forming said plurality of ribs for said exciter device comprisesestablishing narrowed sections at said center sections of said ribs tofacilitate flexing of said ribs during operation of said actuatingdevice, wherein said narrowed sections are established via at least oneof (a) chemical milling and (b) photo etching; and

forming said exciter device by interconnecting a movable rod with saidmounting element and said interface element via said plurality of ribs,and wherein said center sections of said plurality of ribs are arrangeddiagonally between said movable rod and said interface element and saidmounting element, and wherein said narrowed sections facilitate flexingof said ribs during operation of said actuating device.

Optionally, said narrowed sections of said center sections may beestablished remote from said bend portions at the junction between saidend portions and said center section. Optionally, said narrowed sectionsof said center sections are established by chemical etching or photoetching of those sections for a predetermined period of time toestablish the desired or appropriate or predetermined material thicknessof said narrowed sections (where the material at the narrowed sectionsis dissolved or chemically removed until the narrowed sections are at adesired or appropriate or predetermined thickness while the centersection and end portions otherwise remain at the initial materialthickness). Optionally, said actuating device may be oriented to impartmovement in a direction generally along the surface of the actuatingregion of the window panel when said actuating assembly is installed ata window panel of a vehicle and said exciter device imparts movement ina direction generally normal to the surface of the actuating region ofthe window panel in response to actuation of said actuating device whensaid actuating assembly is installed at a window panel of a vehicle.

Therefore, the present invention provides an acoustic window assemblyfor a vehicle that vibrates the window panel while substantially sealingthe window panel at the vehicle. The present invention thus provides anenhanced acoustical device for a vehicle sound system that utilizes apanel or window of a vehicle and thus does not interfere with theinterior space of the vehicle cabin and/or other space at the cabin thatmay be utilized for other vehicle components or the like. Because theacoustic window assembly of the present invention may replace orsupplement one or more speakers and/or subwoofers of the vehicle soundsystem, the acoustic window assembly may achieve substantial weightreduction over typical or conventional audio or sound systems forvehicles. The actuating assembly of the acoustic window assembly of thepresent invention includes an actuating device, such as a piezoelectricactuating device or the like, and an exciter or amplifying device, whichengages the window panel and transfers the pulse of the actuating devicealong a region of the window panel to spread out the forces andmovements/pulses at the window panel. The performance of the acousticwindow assembly thus may not be so highly dependent on the preciselocation of the actuating assembly at the window panel as the acousticdevices of the prior art. The present invention thus allows forplacement of the actuator and exciter device at a perimeter region of awindow panel and avoids placement of an actuator at a central region ofthe vibrating panel. The present invention provides a speaker thatprovides space savings or space reduction and/or weight reduction to thesound system of the vehicle and may include a power system that providespower savings to the sound system of the vehicle. Also, the presentinvention provides a vibratable window panel that is sufficiently sealedaround its perimeter to limit or preclude leaking around the windowpanel. Thus, the present invention is highly suitable for use at awindow panel of a vehicle and overcomes the shortcomings of the priorart devices.

These and other objects, advantages, purposes and features of thepresent invention will become apparent upon review of the followingspecification in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a vehicle with an acoustic windowassembly in accordance with the present invention;

FIG. 2 is a perspective view of an acoustic window assembly of thepresent invention;

FIG. 3 is an interior perspective view of a window panel suitable foruse with the acoustic window assembly of the present invention, shownwith a perimeter mounting element in accordance with the presentinvention;

FIG. 4 is a perspective view of the perimeter mounting element of FIG.3, shown at a corner region of the window panel;

FIG. 5 is a perspective view of the perimeter mounting element of theacoustic window assembly of the present invention;

FIG. 6 is a perspective view of an end region of the perimeter mountingelement of the present invention;

FIG. 7 is a perspective view of another perimeter mounting element forthe acoustic window assembly of the present invention;

FIG. 8 is a perspective view of another perimeter mounting element forthe acoustic window assembly of the present invention;

FIG. 9 is a plan view of a stamped flexible element of the perimetermounting element of FIG. 8;

FIG. 10 is a perspective view of the stamped flexible element of FIG. 9,as joined with the window and vehicle engaging elements of the perimetermounting element of FIG. 8, shown before the flexible element is bent tothe desired shape;

FIGS. 11A and B are sectional views of another sealing element inaccordance with the present invention, shown in a non-compressed stateand a compressed state;

FIGS. 11C-N are sectional views of other flexible sealing elements inaccordance with the present invention;

FIG. 12 is a perspective view of the actuating device and exciter of thepresent invention, shown mounted at a structural platform of a vehicle;

FIG. 13 is a perspective view of an actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention;

FIG. 14 is a side elevation of the actuating device and exciter of FIG.13;

FIG. 15 is an enlarged perspective view of the actuating device at thecentral portion of the exciter of FIGS. 13 and 14;

FIG. 16 is an enlarged perspective view of a rib element suitable forthe exciter of FIGS. 13 and 14;

FIG. 17A is an enlarged perspective view of another rib element suitablefor the exciter of the window assembly of the present invention;

FIG. 17B is a side elevation of the rib element of FIG. 17A;

FIG. 18A is a perspective view of another actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention;

FIG. 18B is a side elevation of the actuating device and exciter of FIG.18A;

FIG. 19 is an enlarged perspective view of the actuating device at thecentral portion of the exciter of FIGS. 18A and 18B;

FIG. 20 is an enlarged perspective view of a rib element suitable forthe exciter of FIGS.

18A and 18B;

FIG. 21 is an enlarged perspective view of another rib element suitablefor the exciter of

FIGS. 18A and 18B;

FIG. 22 is a perspective view of another actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention;

FIG. 23 is a side elevation of the actuating device and exciter of FIG.22;

FIG. 24 is a side elevation of a stamped rib structure suitable for theexciter of FIGS. 22 and 23;

FIG. 25 is an enlarged perspective view of the actuating device andmounting ends for mounting the actuating device at a central portion ofthe exciter of FIGS. 22 and 23;

FIG. 26 is an enlarged perspective view of a mounting end suitable formounting the actuator to the exciter of FIGS. 22 and 23;

FIG. 27 is a perspective view of the actuating device and exciter ofFIGS. 22 and 23, shown mounted at a structural platform of a vehicle;

FIG. 28 is a perspective view of another actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention;

FIG. 29 is a side elevation of the actuating device and exciter of FIG.28;

FIG. 30 is a side elevation of a stamped rib structure suitable for theexciter of FIGS. 28 and 29;

FIG. 31 is a perspective view of another actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention;

FIG. 32 is a side elevation of the actuating device and exciter of FIG.31;

FIG. 33 is a perspective view of another actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention, shown with a biasing element along the actuator;

FIG. 34 is a perspective view of another actuating device and excitersuitable for use with the acoustic window assembly of the presentinvention, shown with a spring element along the actuator;

FIGS. 35-38 are perspective views of other actuating devices and exciterassemblies suitable for use with the acoustic window assembly inaccordance with the present invention;

FIGS, 39A and 39B are perspective views of a pull-type actuating deviceand exciter assembly suitable for use with the acoustic window assemblyin accordance with the present invention;

FIG. 40 is a perspective view of an actuating assembly and seal modulethat is mountable to the sheet metal or frame of a vehicle, such as fora windshield of the vehicle;

FIG. 41 is a side elevation of a portion of the actuating assembly andseal module of FIG. 40; and

FIG. 42 is a perspective view of the installed actuating assembly andseal module with a windshield being installed to the actuating assemblyand seal module as a separate component.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings and the illustrative embodiments depictedtherein, an acoustic window assembly or module or panel loudspeaker 10is mounted to or attached to a vehicle 12 and is operable to vibrate ormove a window panel or glass panel or transparent panel 14 (such as atransparent window panel or an at least partially transparent ortranslucent window panel, such as a tinted glass window panel or thelike) of the window assembly 10 to generate sound within the vehiclecabin (FIG. 1). As shown in FIG. 2, window assembly 10 includes a frameportion 16 that includes an upper frame portion or mounting portion 16 aalong an upper or fixed perimeter portion 14 a of window panel 14 formounting the upper perimeter portion of the window panel to the vehiclesheet metal and a lower frame portion or mounting portion 16 b along thesides and lower perimeter portions 14 b, 14 c of window panel 14 formovably or vibratably mounting the side and lower portions of the windowpanel to the vehicle sheet metal. Window assembly 10 thus is attachableor mountable to a vehicle and sealed relative to the vehicle about itsperimeter, while still allowing movement or vibration at at least one ofthe perimeter portions of the window in response to an output of anactuating assembly 24 so as to vibrate the window panel at a desiredfrequency as may be dictated or driven by the vehicle sound or audiosystem. Window assembly 10 may utilize aspects of the window assembliesdescribed in PCT Application No. PCT/US06/40100, filed Oct. 12, 2006 andpublished Apr. 26, 2007 as International Publication No. WO 2007/047442,which is hereby incorporated herein by reference in its entirety.

Prior audio devices typically make use of the bending resonances of thepanel or membrane by exciting the membrane in a controlled manner usingvibrating devices or actuators. The acoustic window assembly of thepresent invention is designed to control the surface vibration toachieve a motion of the substantially rigid window panel that isprincipally the motion of a rigid surface or substrate. The targetedmotion may be substantially uniform over the surface or substrate, andthe panel may have one side or perimeter region of the panelsubstantially fixed and the opposite side or opposite perimeter regionactuated or vibrated or moved, in order to achieve an essentially linearvariation of the vibration amplitude between the fixed side or fixedperimeter region and the actuated side or actuated perimeter region. Thevibrating device or actuator of the acoustic window panel is disposeddirectly at the panel but at or near a perimeter region of the panel soas to avoid interference with the ability of a person to view throughthe transparent or substantially transparent window panel. The vibratingdevice or actuator of the acoustic window panel is thus disposed at andsubstantially hidden at a perimeter region of a window panel andutilizes a structural surface of the vehicle to react against to providethe desired vibrational frequency and amplitudes to achieve the desiredrange of audible sound.

In the illustrated embodiment, window assembly 10 is a rear windowassembly or backlite assembly. Optionally, the window panel 14 mayinclude heater elements 15 or the like disposed or established over atleast a portion of the window panel for defogging or defrosting thewindow panel, as is known in the automotive window arts. One or moreactuating assemblies 24 may be positioned at the window panel, such asgenerally at or near the bottom or lower perimeter portion 14 c ofwindow panel 14, to excite or vibrate the window panel at or near thelower perimeter region of the window panel and remote from the generallycentral portion of the window panel through which a driver or occupantlooks to view rearward of the vehicle. For example, and as shown in FIG.2, two actuating assemblies 24 may be spaced apart along a lower regionof the window panel and may be cooperatively operable (such as in themanner discussed below) to vibrate or move the window panel to produceor generate the desired vibration and/or acoustics and audible sounds.Optionally, the window panel may include a frit layer or darkened layeror area 14 d at the location of the actuating assemblies 24 so that theactuating assemblies are not readily viewable through the window panelby a person outside of the vehicle.

The actuating assemblies 24 include an actuating device 36 and anexciter device or assembly 38. The actuating device is operable to pulseor vibrate while the exciter device translates the vibration of theactuating device into a high force at the window panel and with agreater stroke than the stroke of the actuating device, as discussedbelow. The exciter device provides a substantially rigid, non-bendingengagement with the window panel so as to vibrate the window panel in auniform manner without flexing of the exciter interface and/or thewindow panel. In applications with two actuating assemblies, theactuating devices are preferably synchronized and operable substantiallyin unison to provide a uniform movement of the lower perimeter region ofthe window panel to provide a uniform, non-bending or non-flexingmovement of the window panel. The window panel may comprise asubstantially stiff glass panel (or other suitable material) to reduceor limit flexing of the window panel during operation of the actuatingassembly or assemblies. The non-bending vibration or motion or singlemode wave motion of the window panel of the acoustic window assembly ofthe present invention provides enhanced sound quality and thus providesan enhanced sound system over prior art panel vibrating mechanisms;which typically vibrate plastic flexible panels at a central region ofthe panel.

In the illustrated embodiment, window assembly 10 includes a generallyrectangular and curved window panel that is mounted to a vehicle frameor sheet metal at a rear portion of the vehicle. The window frameportion 16 encapsulates the perimeter portions of window panel 14 aroundthe perimeter portions or edges of the generally rectangular windowpanel. The window frame portion may substantially restrain or secure theupper perimeter edge portion of the window panel and may partiallyrestrain the side perimeter edge portions and lower perimeter edgeportion of the window panel.

Although shown and described as having the upper perimeter portion ofthe window panel fixed and the sides and lower perimeter portionsmovably sealed with the actuating device at the lower perimeter portionof the window panel, clearly, the frame portion may substantially fixother perimeter portions while leaving other portions partiallyrestricted, without affecting the scope of the present invention.Optionally, the actuating device may be at any perimeter portion of thewindow. Also, although shown and described as being a rear window orbacklite of a vehicle, it is envisioned that the acoustic windowassembly of the present invention is suited for applications at anywindow of the vehicle, such as a side window or side door window orsunroof or moonroof or windshield or the like of the vehicle. The windowpanel may also be any shape, such as a generally rectangular shape or agenerally triangular shape (whereby a portion of one or more perimeteredge portions may be substantially fixed, while a portion of one or moreother perimeter edge portions may be partially restricted), withoutaffecting the scope of the present invention. Also, although describedabove as a glass window panel, the window panel may comprise anysuitable material, such as glass, polycarbonate, glass/laminatecombinations, and/or the like, while remaining within the spirit andscope of the present invention. The window panel may comprise atransparent material that may comprise a substantially clear materialand/or may be tinted or otherwise made partially transparent ortranslucent (such as for a sunroof application where the window panelmay be substantially tinted to reduce transmission of lighttherethrough), while remaining within the spirit and scope of thepresent invention. Thus, it is envisioned that the acoustic windowassembly of the present invention may be applicable at any window of avehicle, irrespective of the materials of the window panel and/or degreeof transparency of the window panel and/or the like.

Frame portion 16 may comprise a polymeric or plastic frame portion, suchas a PVC frame portion or TPE frame portion or rubber or elastomerieframe portion (or a frame portion comprising any other suitablematerial, such as, for example, an ionomer, such as CLARIX® ionomermaterial commercially available from A. Schulman of Akron, Ohio, or thelike) that attaches and seals the perimeter portions of the window panelrelative to the vehicle sheet metal. Optionally, the frame portion mayprovide an encapsulation of the perimeter portions of the window panelor may be bonded or adhered to the inner surface of the window panelalong the perimeter portions of the window panel to provide a generallyflush mounting of the window panel relative to the vehicle body, suchthat an outer surface of the window panel is substantially flush orcoplanar with the adjacent body panels of the vehicle. Frame portion 16may be formed utilizing aspects of the frame portions or encapsulatedwindow modules of the types described in U.S. Pat. Nos. 6,669,267;6,729,674; 6,572,176; 6,394,529; 6,299,235; 6,220,650, which are herebyincorporated herein by reference in their entireties. The window panel14 is attached to or bonded or adhered to the frame portions along therespective perimeter portions (such as via any suitable adhesive orbonding material, such as, for example, a one component urethaneadhesive), and the frame portions may be bonded or adhered or fastenedor otherwise attached (such as via any suitable adhesive or bondingmaterial and/or fasteners) to a metallic frame or sheet metal of thevehicle, so as to secure and seal the frame portions relative to thevehicle.

The upper frame portion 16 a includes an upper sealing and mountingmember 18 that substantially seals against the upper perimeter portion14 a of the window panel to limit leakage between the window panel andthe upper frame portion. The upper portion of the window panel may besealed or adhered or affixed to the frame portion via any suitableadhesive or bonding material, such as a urethane adhesive, such as, forexample, a one component urethane adhesive or other suitable adhesive orbonding material, while remaining within the spirit and scope of thepresent invention. Similarly, the upper sealing and mounting member 18of the frame portion may be attached or affixed to the vehicle frame orsheet metal via any suitable adhesive or bonding material, whileremaining within the spirit and scope of the present invention.

The lower frame portion 16 b includes a pair of side frame portions 20extending along the opposite side perimeter portions 14 b of windowpanel 14 and a lower frame portion 22 along a lower or free perimeterportion 14 c of window panel 14 to seal the side perimeter portions 14 band lower perimeter portion 14 c of window panel 14 against the vehiclewhile allowing the window panel 14 to vibrate or move during vibrationof a vibrating or actuating device or actuating assembly 24, asdiscussed below. Thus, the upper perimeter portion 14 a of window panel14 may be substantially fixedly secured and sealed relative to thevehicle frame, while the side frame portions 20 and lower portion 22 ofwindow frame 16 partially retain or restrain the respective . perimeterportions of the window panel along the vehicle frame.

Side frame portions 20 receive and/or are bonded or adhered to therespective side perimeter portions of the window panel and extend alongor at least partially along the respective side perimeter portions 14 bof window panel 14, while lower frame portion 22 is bonded or adhered toand along or partially along the lower perimeter portion 14 c of windowpanel 14. Optionally, and as can be seen in FIGS. 3 and 4, side frameportions 20 and lower frame portion 22 of lower frame 16 b may beunitarily formed and/or are joined together at the lower perimetercorner regions of the window panel 14. Side frame portions 20 and lowerframe portion 22 may comprise a suitably flexible material or structureor construction to provide a flexible characteristic along the side andlower perimeter portions 14 b, 14 c of window panel 14 so as to allowflexing or vibration or movement of the window panel when the lowerperimeter portion 14 c of window panel 14 is vibrated by the vibratingdevice. Optionally, and as can be seen in FIG. 6, the upper ends of theside frame portions may have tapered or ramped elements 32 to provide aramped change in thickness of the side frame portions 20 at their upperends, such as for applications where the upper frame member or sealingmember or element 18 has a lower profile than the side frame portions20.

In the illustrated embodiment, the side frame portions 20 and lowerframe portion 22 each include a sheet metal attaching member or element26 and a window panel attaching member or element 28, which are attachedor connected together via a flexible member or element 30. The sheetmetal attaching element 26 comprises an elongated member, such as aplastic or polymeric molded or extruded member or the like, that has achannel 26 a and a pair of extensions or legs 26 b along opposite sidesof and defining the sidewalls of channel 26 a, whereby the legs 26 b mayengage the sheet metal of the vehicle, while a suitable adhesive may bedisposed along and within the channel 26 a to bond or adhere or affixthe sheet metal attaching element 26 to the vehicle sheet metal.

Likewise, the window panel attaching element 28 comprises an elongatedmember, such as a plastic or polymeric molded or extruded member or thelike, that has a channel 28 a and a pair of extensions or legs 28 balong opposite sides of and defining the sidewalls of channel 28 a,whereby the legs 28 b may engage the inner surface of the window panel,while a suitable adhesive may be disposed along and within the channel28 a to bond or adhere or affix the window panel attaching element 28 tothe inner surface of the respective perimeter regions of the windowpanel.

Attaching elements 26 and 28 are joined together or interconnected viaflexible element 30, which, in the illustrated embodiment of FIGS. 3-6,comprises a curved or generally U-shaped metallic element that flexes toallow for relative movement between the attaching elements 26, 28 duringvibration of the window panel 14. The flexible elements 30 extend alongthe respective attaching elements 26, 28 and may extend substantiallycontinuously along the respective perimeter portions of the window panelwhen the frame is attached or bonded to the window panel. As can be seenin FIGS. 3 and 4, the flexible elements 30 may be spaced apart at thecorner regions of the window panel, while the attaching elements extendsubstantially continuously along the perimeter regions of the windowpanel.

4,

As shown in FIG. 5, the ends 30 a of flexible element 30 may be attachedto (such as via insert molding or the like) the respective ones of theattaching elements 26, 28. As best shown in FIG. 5, the U-shapedflexible element 30 functions to space the opposed surfaces of theattaching elements 26, 28 from one another and flexes during vibrationof the window panel (and thus during vibration of the window attachingelement 28) to allow for vibration of the window panel relative to thevehicle sheet metal and relative to the sheet metal attaching element26. In the illustrated embodiment, the window attaching element 28overlaps the sheet metal attaching element and includes a leg orextension 280 that extends partially along the outer perimeter edge ofthe sheet metal attaching element. The leg or extension 28 c maymaintain alignment of the window attaching element relative to the sheetmetal attaching element and/or may limit movement of the window paneltoward the vehicle body or sheet metal during operation of the actuatingdevice and/or in response to a force pushing the window panel toward thevehicle body.

Thus, the lower frame portion 16 b functions to mount the window panelthe vehicle body or sheet metal while allowing for vibration of thewindow panel relative to the vehicle body or sheet metal. The flexibleelement is formed to provide a desired degree of resistance to movementof the window panel, while allowing the vibration of the window panelduring operation of the actuating device. The flexible element alsoprovides the desired shear and torsional rigidity to the window frame tolimit or substantially preclude movement of the window panel relative tothe vehicle body or frame or sheet metal except in the direction towardand away from the vehicle body or frame or sheet metal, as discussedbelow. A flexible sealing element or seal 27 may be disposed around theperimeter edge region of the window panel and outboard of the frameportions 20, 22 to substantially seal the side and lower perimeterportions of the window panel relative to the vehicle to limit orsubstantially preclude water and/or air leakage between the window paneland vehicle body.

Optionally, and with reference to FIG. 7, a lower frame portion 16 b′ ofa window mounting frame may have a plurality of sections or portions 21′(one shown in FIG. 7), which includes a flexible element 30′ connectinga window attaching element 28′ to a sheet metal attaching element 26′,such as in a similar manner as described above, spaced apart orseparated by other frame portions 29′. Frame portions 29′ include awindow attaching element 29 a′ for attaching to the window panel 14′ anda sheet metal attaching element 29 b′, which may be integrally formedtogether or joined together via a plastic or polymeric (or metallic)connecting element 29 c′. The lower frame portion 16 b′ thus includesthe flexible elements 30′ to provide the desired resistance to movementor vibration of the window panel, while providing other degrees offlexibility elsewhere around the perimeter regions of the window panel.The portions 21′, 29′ may abut one another to provide continuous supportaround the perimeter region of the window panel.

Optionally, and with reference to FIGS. 8-10, a lower frame portion 16b″ may be substantially similar to lower frame portion 16 b, discussedabove, but may include a cut or serrated flexible element 30″. As shownin FIG. 9, the flexible element 30″ may be stamped or formed of ametallic material so as to have a plurality of apertures therethrough.The stamped or formed element may then be insert molded or otherwisesecured to the window attaching elements 28″ and the sheet metalattaching elements 26″ while in its flat or planar form (such as shownin FIG. 10), and then may be bent to the final curved shape as shown inFIG. 8. Optionally, the flat ends or sides 30 a″ of the flexible element30″ may be insert molded in or attached to the attaching elements suchas shown in FIG, 10, or the ends or sides of the flexible element may bebent or curved and insert molded in or attached to the attachingelements in the manner shown in FIG. 8, or may be otherwise attached toor insert molded in the attaching elements, depending on the particularapplication. The attaching means and the perforations and the materialselected for the lower frame portion of the acoustic window assembly maybe selected depending on the particular application and desiredperformance of the window assembly.

Optionally, other frame portions and flexible elements or flexibleelement designs or forms may be implemented, depending on the particularapplication. For example, and as shown in FIGS. 11A and 11B, a frameportion 120 may include a sheet metal attaching member or element 126and a window panel attaching member or element 128, which are attachedor connected together via a flexible member or element 130. Theattaching elements 126, 128 may comprise elongated members, such as aplastic or polymeric molded or extruded member or the like, such assimilar to the attaching elements 26, 28, discussed above. In theillustrated embodiment, attaching elements 126, 128 are joined by aflexible strip or element 127, which flexes with flexible element 130 asthe frame portion is flexed between a non-compressed state (FIG. 11A)and a compressed state (FIG. 11B). Attachment elements 126, 128 may bemolded over flexible element 130 so that flexible element 130 issubstantially encased within an encapsulating portion or overmoldedportion 129 of the unitarily molded or integrally molded attachmentelements 126, 128 (such that the perimeter frame portion is generallyunitarily formed).

The perimeter frame portion and attachment elements may otherwise besubstantially similar to the frame portions and attachment elementsdiscussed above, such that a detailed discussion of the perimeter frameportions and attachment elements need not be repeated herein. Attachmentelement 126 includes a channel 126 a and a pair of extensions or legs orwalls 126 b along opposite sides of and defining the sidewalls ofchannel 126 a, whereby the legs 126 b may engage the sheet metal of thevehicle, while a suitable adhesive may be disposed along and within thechannel 126 a to bond or adhere or affix the sheet metal attachingelement 126 to the vehicle sheet metal (with the legs establishing thedesired gap or spacing for the adhesive disposed within the channel),and attachment element 128 includes a channel 128 a and a pair ofextensions or legs or walls 128 b along opposite sides of and definingthe sidewalls of channel 128 a, whereby the legs 128 b may engage theinner surface of the window panel, while a suitable adhesive may bedisposed along and within the channel 128 a to bond or adhere or affixthe window panel attaching element 128 to the inner surface of therespective perimeter regions of the window panel. Flexible element 130may comprise a curved or generally U-shaped metallic element that flexesto allow for relative movement between the attaching elements 126, 128during vibration of the window panel.

Optionally, and with reference to FIGS. 11C-H, other forms of flexibleelements and/or attachment elements may be implemented while remainingwithin the spirit and scope of the present invention. For example, theflexible element 130 (FIG. 11C) may be generally U-shaped and receivedwithin respective portions 126 c′, 128 c′ of the attachment elements126′, 128′, with the flexible element receiving portions 126 c′, 128 c′being attached to or molded with respective channel portions or strips126 d′, 128 d′. Optionally, for example, the attachment element 126″(FIG. 11D) may extend from the channel portion to space the flexibleelement 130′ from the sheet metal and to allow additional flexing at theattachment element 126″. Optionally, the flexible element 130″ (FIG.11E) may be formed with an additional bend or curvature in theattachment element 126″. Optionally, the attachment element 126′ mayinclude a narrowed neck portion 126 e to enhance flexing of theattachment element, while the flexible element 130″ may include anadditional bend or curvature within attachment element 126″ and throughneck portion 126 e, such as shown in FIG. 11F. Optionally, the flexibleelement 130′ may be received in an attachment element 126″″ (FIG. 11G)that may be generally similar to attachment element 126″, discussedabove, with a reduced amount of overmolded material at the junction 126f of the attachment element and flexible element. Optionally, anattachment element 126′ (FIG. 11H) may be formed to receive or overmolda flexible element 130′, which may have an additional bend or curvatureto enhance the attachment of the flexible element at the attachmentelement.

Optionally, other frame portions and/or flexible elements or flexibleelement designs or forms may be implemented, depending on the particularapplication. For example, the flexible element may comprise variousU-shaped forms or V-shaped forms or C-shaped forms or the like, oroptionally, and with reference to FIG. HI, the flexible element 230 maycomprise a multi-curved element. Optionally, and with reference to FIG.11J, the flexible element 230′ may comprise a flexible or compressibleor elastomeric material disposed between the window attaching element228′ and the sheet metal attaching element 226′. The flexible material230′ may be disposed substantially entirely between the attachingelements or may be partially disposed between the attaching elementswith a space or void 231′ (FIG. 11K) established between the attachingelements. Optionally, the flexible element or elements 230″ (FIGS.11L-11N) may comprise metallic or polymeric elements disposed orestablished between the attaching elements and bent or curved to allowfor flexing of the flexible elements during vibration of the windowpanel relative to the vehicle body or sheet metal. Other support orframe configurations for vibratably attaching the window panel to thevehicle body or sheet metal may be implemented while remaining withinthe spirit and scope of the present invention. Optionally, the frameportions may utilize aspects of the frame portions described in PCTApplication No, PCT/US06/40100, filed Oct. 12, 2006 and published Apr.26, 2007 as International Publication No. WO 2007/047442, which ishereby incorporated herein by reference in its entirety.

The selected materials and configurations of the side frame portions 20and lower frame portion 22 are selected to provide the desired degree offlexibility along the perimeter portions of the window panel so as toallow vibration and slight movement of the window panel relative to thevehicle body or sheet metal and without leakage occurring between thewindow panel and window. side frame portions and between the windowframe portion and the vehicle body or sheet metal or frame portion. Theperimeter frame portions are configured to allow the appropriate amountof flexing or movement along the frame portions such that the range ofallowed movement or stroke of the window panel is within the range ofthe movement or stroke of the actuating assembly so as to limit orsubstantially preclude the window panel from moving too much andcontacting or fouling against the vehicle frame or the like.

The materials for the side frame portions and/or the attaching elementsand/or the flexible inserts or elements along the side frame portions oralong the window panel may be selected to provide a desired degree ofresiliency or flexibility or softness (and the desired or appropriaterange of motion of the window panel toward and away from the vehiclebody or frame or sheet metal) along or partially or substantially alongthe side perimeter portions of the window panel to allow the windowpanel to vibrate in the desired manner. Optionally, other fasteners orposts or structures or the like may be provided at or attached to oradhered or taped to the side frame portions to limit or substantiallypreclude lateral movement of the window panel, while allowingflexibility and slight movement of the window panel in the inward andoutward directions.

Optionally, the frame portions may comprise generally continuouselements that extend around or at least partially around or along theperimeter regions of the window such that the frame portions maycomprise continuous rings or perimeter elements. Optionally, the mainbody portions or attachment elements of the frame may be extruded andthen the extrusions may be disposed in a mold cavity, whereby the cornerportions (such as between the opposed ends of adjacent frame portions)and end ramps of the frame portions may be molded at or to theextrusions. Thus, the frame portions may comprise discontinuousperimeter elements with the gaps between the discontinuous elementsfilled or spanned or at least partially spanned by the molded cornersections and/or end ramps. Optionally, for example, the perimeter frameportion may comprise three extruded elements disposed at respectiveperimeter portions or regions of the window, with separate elements orpieces provided at the corners and between adjacent extruded elements.Other frame and seal configurations may be implemented while remainingwithin the spirit and scope of the present invention.

Thus, various types of lower frames or frame portions or mountingportions may be implemented that provide the desired degree offlexibility along the side perimeter portions and lower perimeterportion of the window panel, without affecting the scope of the presentinvention. The frame portions thus allow for movement or vibration ofthe window panel in an inward and outward direction but substantiallyretain the window panel in place and seal the window panel relative tothe vehicle frame. The frame portions are adhered or bonded or otherwiseattached to the vehicle body or frame portion or sheet metal along anattaching surface (which may be defined as a recess or channel along theframe portion for receiving a bead of adhesive or the like therealongfor adhering or bonding the window frame portion to the vehicle sheetmetal) of the frame portions (while the upper or fixed frame portion issimilarly attached to the vehicle frame portion or sheet metal at theupper or fixed perimeter portion of the window panel).

The frame portion or mounting portion of the window assembly of thepresent invention thus allows for the window panel to move in a hingingmotion with the upper portion or roofline portion of the window panel(or other perimeter portion depending on the particular application ofthe window panel assembly) being in a generally fixed state, and withthe lower portion of the window panel (and/or other perimeter portiondepending on the particular application of the window panel assembly)moving in or out relative to the vehicle body or frame or sheet metal,and preferably moving with only two degrees of freedom since lateralmovement of the window panel is limited or substantially precluded bythe frame or mounting portions. The side frame portions (or otherperimeter portion or portions depending on the particular application ofthe window panel assembly) may flex as the actuating assemblyarticulates in a motion generally normal to the window panel surface (atthe lower region of the window panel where the actuating assembly islocated), so as to allow the window panel to move and vibrate in thedesired or appropriate manner in response to actuation of the actuatingassembly.

The actuating assembly 24 is located at an actuating region of thewindow panel and between a first perimeter region of the window panel(where a mounting portion or frame portion substantially fixedly mountsthe respective first perimeter region of the window panel relative tothe vehicle structure) and a second perimeter region of the window panel(where a mounting portion or frame portion mounts the respective secondperimeter region of the window panel to the vehicle structure to allowfor movement of the second perimeter region of the window panel towardand away from the vehicle structure), For example, the actuatingassembly 24 may be located at a lower region of the window panel 14, andthus may be positioned at or near or on a parcel shelf or the like ofthe vehicle (such as a sedan or coupe or the like, but could otherwisebe positioned at or in a rear door or tailgate or liftgate of a stationwagon or van or minivan or SUV or the like), where the actuatingassembly is not readily viewable and does not interfere or substantiallyinterfere with a driver's rearward field of view through the rear windowof the vehicle. As best shown in FIG. 12, actuating assembly 24 may bemounted to the vehicle frame portion 12 a via a mounting block or rigidstructure 34. In the illustrated embodiment, the mounting block 34 is asubstantially rigid elongated member or block that mounts to a generallyhorizontal portion 12 b (such as at a parcel shelf at the rear of thevehicle and at or near where the lower portion of the window panel meetsor approaches the vehicle frame) of the vehicle frame portion, andpreferably to a substantially rigid and non-flexible mounting or frameportion of the vehicle, such as a substantially rigid mounting structureor platform at the parcel shelf or other frame or body or vehiclestructure at which the actuating assembly may be substantially fixedlymounted.

The mounting block and/or the frame portion of the vehicle may beconfigured or angled so as to angle the actuating assembly to begenerally parallel to or generally along the inner surface of the windowpanel 14. The mounting block 34 thus functions to bridge the gap betweenthe window panel and the parcel shelf or frame portion of the vehicleand to orient the actuating assembly at the desired or appropriate anglealong the window panel. The mounting block may be attached to the sheetmetal or frame portion or structure of the vehicle and an interior trimpanel may partially or substantially encase or conceal the actuatingassembly at the lower region of the rear window panel at the parcelshelf of the vehicle (or elsewhere depending on the particular vehicleapplication and/or window application of the acoustic window assembly),so that the actuating assembly is not readily viewable by a personviewing the window panel from either inside or outside of the vehiclecabin.

Although shown and described as being attached to a rigid structure orplate or block which is in turn attached to the vehicle structure tospace the actuating assembly from the vehicle structure, it isenvisioned that the actuating assembly may be attached directly to thevehicle structure or sheet metal without any spacing or mounting block.Preferably, the vehicle structure or sheet metal may include or providea mounting area for the actuating assembly, such as a raised,substantially rigid or non-flexible platform or the like, whereby theactuating assembly may be adhered or bonded or otherwise secureddirectly to the vehicle structure. For example, a lower plate 40 b of anexciter 38 (discussed below) may be bonded or adhered or otherwiseattached/secured (such as via fasteners or the like through endextensions at opposite ends of the lower plate 40 b) to the vehiclestructure, whereby the upper plate 40 a is bonded or adhered or attachedto the interior surface of the window panel, such as discussed below.Optionally, the vehicle structure or sheet metal may be formed with arecess or sill or depression for receiving or partially receiving theactuating assembly, without affecting the scope of the presentinvention. The actuating assembly may be formed to correspond to thesheet metal form and may be adhered or bonded or otherwise attacheddirectly to the sheet metal or vehicle structure (such as via the lowerplate of the actuator being bonded or attached to the vehicle structureor sheet metal), or the actuating bracket may be attached via a bracketor mounting block as described above or via any other suitableattachment means for substantially fixedly or rigidly attaching theactuating bracket to the vehicle.

Thus, the upper plate of the exciter or actuating assembly thus may beattached to or affixed to or bonded to the interior surface of thewindow panel while the lower plate (or mounting block or bracket) isattached or affixed or bonded to the vehicle frame or sheet metal. Forexample, the upper plate of the exciter or actuating assembly (or arigid or substantially rigid interface member or plate or elementattached to the upper plate of the exciter or actuating assembly) may bebonded or adhered to the interior surface of the window panel via asuitable adhesive, such as, for example, a two component mixed urethaneadhesive or other suitable adhesive or bonding or attaching material,while remaining within the spirit and scope of the present invention.Also, for example, the lower plate (such as a rigid or substantiallyrigid plate or elongated member) of the exciter or actuating assembly(or the mounting bracket of the exciter or actuating assembly) may beadhered or bonded or affixed to the vehicle sheet metal via any suitableadhesive or bonding material, such as a two component mixed urethaneadhesive or other suitable adhesive or bonding or attaching material,while remaining within the spirit and scope of the present invention.

The actuating assembly 24 is operable to vibrate in a manner thatimparts a non-bending vibratory movement that is substantially limitedto motions that are generally normal to or transverse to the windowpanel at the location of the actuating assembly, such that the windowpanel is moved only inward and outward at the lower window panel portionby the actuating assembly. Movement of the lower perimeter portion ofthe window panel in this manner causes the window panel to move about orrelative to the fixed upper perimeter portion in a hinge like motionabout the fixed upper perimeter portion of the window panel. Thestiffness of the plates of the exciter assembly and the stiffness of theglass or window panel allow for non-bending motion of the window panelin the cross-car or lateral direction, while the window panel may flexor the bonding material or sealing element at the upper perimeterportion of the window panel may flex to allow for the vibratory,hinge-like action relative to the upper portion of the vehicle body orframe or sheet metal.

In the illustrated embodiment, actuating assembly 24 comprises apiezoelectric actuating device or element 36 that is operable to move oractuate or excite a mechanical exciter device or element 38 that engagesthe interior surface of the window panel so as to impart the movement atthe window panel. As shown in FIGS. 12-15, exciter device 38 receivespiezoelectric actuating device 36 therein, whereby a pulse or vibrationor motion imparted by piezoelectric actuating device 36 is received byexciter device, which in turn imparts a pulse or vibration or motionagainst the window panel 14.

Piezoelectric actuating device 36 may be any type of piezoelectricdevice, and may utilize aspects of the devices described in U.S. Pat.Nos. 6,904,154; 6,865,277; 6,839,444; and 6,522,755, and PCT ApplicationNo. PCT/US06/40100, filed Oct. 12, 2006 and published Apr. 26, 2007 asInternational Publication No. WO 2007/047442, which are all herebyincorporated herein by reference in their entireties. The piezoelectricactuating device may include a plurality of plates or discs thatfunction to generate a pulse or stroke of an end plate or end face 36 aof the device. In the illustrated embodiment, piezoelectric actuatingdevice 36 comprises an elongated piezoelectrical stack and may beoperable to generate a pulse or stroke at each of its end faces 36 a of,for example, approximately 20 to 50 microns at each end or approximately40 to 100 microns total displacement of the piezoelectric actuatingdevice when the device is actuated. The piezoelectric actuating devicemay exert a force of, for example, approximately 2000 Newtons or about1500 to 2500 Newtons at the end faces when the device is actuated. Thepiezoelectric actuating device pulses the end face, which imparts aforce and movement at the exciter, while the actuating device provides asubstantially equal and opposite force and movement at the opposite endor end face of the actuating device so that the forces and movements arepulsed at both ends of the piezoelectric actuating device. The end facesthus may move or pulse outwardly and inwardly together, such that anoutward pulse or movement of one of the end faces occurs atsubstantially the same time as a similar outward pulse or movement ofthe other end face.

The piezoelectric actuating device is connected to a power source and isactuated and controlled to pulse or vibrate at a desired or appropriateamplitude and frequency. Such piezoelectric devices typically are highvoltage (such as about 160 volts and up to about 200 volts), low currentdevices. Thus, the piezoelectric actuating device is preferablyconnected to a voltage step up converter or amplifier, which may step upor convert the input voltage (such as about 12 volts from the vehiclepower source or battery) to a higher output voltage (such as about 160volts or more or less depending on the desired or appropriate voltagefor operation of the piezoelectric device), while stepping down orreducing the current that is applied to the actuating device. Theamplifier thus may be connected to the vehicle power source and mayprovide a high voltage, low current power source for the piezoelectricactuating device, whereby the piezoelectric actuating device vibrates orpulses at the desired amplitude and frequency to actuate the exciter 38.

For example, the actuating device may function at a low frequency range(such as for a sub-woofer application), such as a frequency of less thanabout 200 Hz, such as a range of about 20 Hz to about 120 Hz or to about180 Hz or thereabouts. Optionally, however, the acoustic window assemblymay vibrate the window panel at other desired frequencies (such asfrequencies above 200 Hz), and may be able to use the vibrating windowpanel as an additional low, medium or high range speaker that is capableof generating sound throughout a wide range of frequencies. The windowassembly thus may provide the desired range of sound waves depending onthe particular application and desired sound output of the acousticwindow assembly. Optionally, the acoustic window assembly may be used toprovide external sound generation (such as at a broader frequency range)for listening to music or the like from outside the vehicle, if desired,such as for picnics or “tailgating” functions and/or the like.

The exciter 38 is an elongated element or member that receivespiezoelectric actuating device 36 at a generally central region of theexciter (however, the piezoelectric actuating device may be positionedelsewhere along the exciter, and/or may include two piezoelectricactuating devices, with one at each end or end region of the exciter,without affecting the scope of the present invention). Exciter 38comprises an elongated, substantially rigid upper side member or upperplate 40 a and an elongated, substantially rigid lower side member orlower plate 40 b and a pair of generally central members or rods or ribsor plates 42 that extend between the plates 40 a, 40 b and that engagethe respective end faces of the piezoelectric actuating device 36 (whichmay be received in or engage inner end portions or receptacles 46 at theinner ends of the central rods 42). Central rod 42 and plates 40 a, 40 bare interconnected via a plurality of angled or diagonal members or ribs44, which, in the illustrated embodiment, angle outward and away fromthe piezoelectric actuating device and from the central rod 42 and tothe respective one of the plates 40 a, 40 b. The exciter thus has agenerally fish-bone shape of ribs extending outward at either end of thepiezoelectric actuating device.

The central plates and upper/lower plates and ribs may comprise variousmaterials, such as metallic materials or plastic or polymeric materials.Preferably, the materials and/or thicknesses selected for the upper andlower plates provide substantial rigid plates to provide the desirednon-bending vibratory motion of the plates and window panel duringoperation of the actuating device. For example, the plates may comprisea metallic material, such as, for example, 1080 or 4130 steel or othersuitable metallic material, or engineered plastics or other suitablehigh strength plastic or polymeric materials. Optionally, the ribs maycomprise a flexible material to allow for flexing during operation ofthe actuating device. For example, the ribs may comprise spring steel orstainless steel, such as, for example, 17-7 PH stainless steel or 302stainless steel or 1080 steel or the like, or other suitable metallicmaterial or suitable plastic or polymeric material). Optionally, forexample, the plates or the ribs may comprise a NANOFLEX® material(commercially available from Sandvik Materials Technology), which mayprovide the desired strength while allowing for reduced mass and weightof the exciter assembly.

The inboard ends of the central plates 42 are engaged with or attachedto the end faces of piezoelectric actuating device 36 (which may bereceived in receptacle elements 46 at the ends of the plates 42) so thatmovement of the end faces 36 a imparts a corresponding longitudinalmovement of the central plates 42. The receptacle ends 46 at the inboardends of the plates 42 may be formed to correspond to the shape or formof the end faces of the piezoelectric actuating device, and may connectto or attach to the end faces (such as via a threaded type engagement ora snap type engagement or a ball and socket type engagement or the like)so that the longitudinal movement of the end faces is substantiallytranslated to longitudinal movement of the central plates 42. Theexciter functions to amplify the stroke of the piezoelectric actuatingdevice and to divert the stroke toward and away from the window panel soas to function as a mechanical amplifying device or element that isresponsive to the piezoelectric actuating device.

When mounted in the vehicle, the rigid lower plate 40 b of exciter 38 isfixedly secured to mounting block 34, which is fixedly secured to thevehicle frame portion or sheet metal (or the rigid lower plate may mountdirectly to the vehicle body or frame or sheet metal), while the rigidupper plate 40 a of exciter 38 is adhered to or secured to the interiorsurface of the window panel 14. Optionally, and desirably, the upperplate 40 a and/or lower plate 40 b of the exciter 38 may be formed togenerally correspond with the shape of the window panel and/or the shapeof the mounting bracket or vehicle sheet metal, respectively. Forexample, and as can be seen in FIG. 12, the upper plate (or an attachingelement or interface element attached to the upper plate) may be formedto have a thicker cross section at a central region so as to provide acurved upper attaching surface for attaching or adhering or bonding to acurved portion or surface of the window panel. Optionally, the upper andlower plates or plate portions may also include raised ribs orprotrusions or dimples or projections or the like at their attachingsurfaces, such that the raised protrusions engage the inner surface ofthe window panel or the mounting platform or surface of the vehicle toestablish or provide the desired bond layer thickness or adhesive layerthickness between the attaching surfaces of the exciter and thecorresponding window panel or bracket or vehicle structure.

As discussed above, longitudinal movement of the end faces 36 a ofpiezoelectric actuating device 36 imparts a corresponding longitudinalmovement of the central plates 42 of exciter 38. Because the upper andlower plates 40 a, 40 b are substantially fixedly attached to the windowpanel and vehicle frame, respectively, such longitudinal movement of thecentral plates 42 causes the ribs 44 to flex and/or pivot at theirattachment areas 44 a and to move the upper and lower plates 40 a, 40 btoward and away from one another. For example, when the end faces 36 aof the piezoelectric actuating device 36 move outward and away from thepiezoelectric actuating device, the central plates are also movedoutward and away from the piezoelectric actuating device. Such outwardmovement of the central plates 42 relative to the fixed plates 40 a, 40b causes the attachment areas 44 a of the ribs to flex and for the ribs44 to exert a force against the respective plates 40 a, 40 b to move theupper plate 40 a outward away from the lower plate 40 b so as to exertan outward force and motion against the window panel 14. Movement of theend faces 36 a of the piezoelectric actuating device 36 in the inwardlongitudinal direction imparts a similar but opposite movement of thecentral plates 42 and upper/lower plates 40 a, 40 b of the exciter 38.Ribs 44 thus pivot and/or flex to move the upper/lower plates 40 a, 40 btoward and away from the central plate 42 and toward and away from oneanother as the piezoelectric actuating device pulses to move the centralplates inward and outward along the longitudinal axis of the exciter.

In the illustrated embodiment, and as shown in FIG. 16, each rib 44comprises a stamped or formed metallic rib having a generally centralportion 44 b and opposite end or attaching portions 44 a, The endportions 44 a are bent relative to the central portion 44 b, such thatthe end portions may be generally parallel to one another and parallelto the central rod or plate 42 and the respective upper or lower plate40 a, 40 b, with the central portion 44 b of the rib 44 being at anangle therebetween. The central portion 44 b of rib 44 may comprise asubstantially rigid or non-flexing portion, while the bend area at thejunction of the central portion 44 b and the end portions 44 a may flexduring operation of the actuating assembly to allow for translation of alateral or generally horizontal movement of the rod or plate 42 to agenerally vertical movement of the upper or lower plate 40 a, 40 b. Inorder to stiffen the central portion 44 b of the rib 44, the centralportion 44 b may have additional material or structure formed orestablished thereat. For example, and as shown in FIG. 16, the centralportion 44 b may include an additional layer or layers 44 c of themetallic material folded or overlayed over and/or around the centralportion 44 b (such as, for example, by stamping a rib element andfolding one or more wings of the central portion over one or both of thesurfaces of the central portion) to strengthen/stiffen the centralportion of the rib 44.

In the illustrated embodiment, the end portions 44 a of the rib 44include tabs 44 d extending laterally outward therefrom. Tabs 44 d arebent relative to the respective end portion 44 a to assist in locatingand attaching the rib 44 to the central rod or plate 42 and the upper orlower plate 40 a, 40 b. For example, and as can be seen in FIG. 15, thetabs 44 d may be received in correspondingly shaped or formed notchesalong the side edges of the central plate 42 and respective upper/lowerplate 40 a, 40 b. Optionally, the ribs may also or otherwise be attachedto the respective plates via other suitable attaching means, such aswelding or soldering or adhering or bonding or the like, while remainingwithin the spirit and scope of the present invention.

By receiving the tabs 44 d in the notches, longitudinal movement of theribs 44 relative to the plates 40 a, 40 b, 42 is substantially precludedduring operation of the actuating assembly. Thus, longitudinal movementof the central plate 42 moves the end portions of the ribs that areattached to the central plate to move longitudinally, which (due to thefixed attachment of the upper plate to the window panel and the lowerplate to the vehicle) imparts a generally transverse movement of theother end portions of the ribs and of the respective upper and lowerplates, The bend joints or junctions of the end portions and centerportions of the ribs flex to allow the ribs to impart such a transverseforce and movement without detaching from either of the upper/lowerplates 40 a, 40 b and the central plate or rod 42.

Optionally, other rib shapes or forms or diagonals may be implementedwhile remaining within the spirit and scope of the present invention.For example, and with reference to FIGS. 17A and 17B, a rib or diagonalelement 144 may comprise a formed metallic rib having a generallycentral portion 144 b and opposite end or attaching portions 144 a. Theend portions 144 a are bent relative to the central portion 144 b, suchthat the end portions may be generally parallel to one another andparallel to the central rod or plate and the respective upper or lowerplate of the exciter, with the central portion 144 b of the rib 144being at an angle therebetween. The central portion 144 b of rib 144 maycomprise a substantially rigid or non-flexing portion, while a bend orflex area 144 c at or near the junction of the central portion 144 b andthe end portions 144 a may flex during operation of the actuatingassembly to allow for translation of a lateral or generally horizontalmovement of the rod or plate to a generally vertical movement of theupper or lower plate.

In the illustrated embodiment, the rib 144 is formed so that the bend orflex areas 144 c have a reduced thickness as compared to the centralportion 144 b and end portions 144 a of the rib 144. The thin ornarrowed sections that create the bend or flex zones are disposed orestablished inward of or remote from the bend or transition 144 dbetween the planar portion 144 e of the end portion 144 a that ismounted to the upper or lower plate or beam and the angled portion 144 fof the end portion that is generally at the angle of or aligned with theangular or angled central portion or section 144 b of the rib. The bendor flex zones are thus at the body of the diagonal central section 144b. Such a configuration enhances the manufacturing of the ribs, andallows the manufacturer to optionally utilize chemical milling and/orphoto etching processes to create the rib with the narrowed bend or flexzones or portions. Optionally, any suitable forming means may beimplemented to form the ribs, such as chemical milling or photo etchingwith a forming operation, or stamping and fine blanking with coining toform the bend zones, or the like, while remaining within the spirit andscope of the present invention.

For example, the ribs may be formed from a sheet of material and thenarrowed flex zones may be established via a photo etching process orprocesses. Such photo etching or photo chemical machining (also referredto as photo fabrication, chemical blanking or photo chemical milling) isknown in the production of precision parts such as small parts forelectronic products, and may be provided by Microphoto, Inc. ofRoseville, Mich. The photo etching process typically is used to cut outor form small parts in detailed patterns. The process typically includesmaking an outline of the desired patterned product on a photo tool andlaminating one or both sides of a product plate with a photo-resistantmaterial. The product is then exposed on the laminated product plate sothat the product outline or profile is established on the plate. Anetching process is performed which functions to dissolve (such as via asuitable etching fluid or chemical or the like) the residue material(the material around the product outline and not part of the finalproduct) so that, upon completion of the etching process, the product isformed to its desired patterned shape.

In the application of such a photo etching process to the formation ofthe ribs for use in the actuating assembly of the present invention, thenarrowed flex zones of the ribs are formed by the chemical etching fromeach side of a flat plate that is to be formed or etched to the desiredshape of the ribs. The flex zones are demarcated or established on theplate so that those zones (and not the other sections of the ribs) areetched by the etching process. The etching step or process is thenlimited to a predetermined time period that results in the etchingprocess dissolving the part material at the flex zones so as to reducethe thickness of the part at the flex zones a desired or predeterminedamount. Such a process can be highly accurate and repeatable to reduceor remove or dissolve a desired or appropriate or predetermined amountof material at the flex zones and thus to leave a desired or appropriateor predetermined thickness of the material to achieve the desired orappropriate or predetermined flexibility of the ribs at the flex zones.Also, the etching process (such as a separate etching process eitherbefore or after the forming or etching of the flex zones) may be used tocut or etch or form the individual ribs from a plate of the metallicmaterial. After the ribs are formed or shaped and have the narrowed flexzones established thereon, the ribs may be mechanically bent or formedto have the desired bends at the junction of the center section and theend sections of the ribs.

Thus, the photo etching process may form the ribs and the narrowed flexzones without any mechanical cutting of the ribs or plate material. Sucha process thus provides enhanced accuracy in forming the ribs and flexzones without any burrs or imperfections or external stresses that mayotherwise result from a stamping or cutting or grinding operation or thelike. The ribs thus may be readily formed with the narrowed flexsections or zones in a highly accurate and repeatable manner.

Thus, and as can be seen with reference to FIG. 1, the piezoelectricactuating device 36 generates a stroke or pulse generally along thewindow panel at which it is positioned. The ribs and plates of theexciter are configured so that the pulse of the piezoelectric actuatingdevice (of a distance of about 40 to 75 microns) may, for example, betransformed into a pulse of the upper plate 40 a of about 0.1 to about0.3 mm of displacement or up to about 0.5 mm of displacement, while theforce exerted by the piezoelectric actuating device may be, for example,about 1500 to 2500 Newtons, which may be converted or transformed to aforce of about 250 Newtons or about 100 to 300 Newtons or thereaboutsexerted by the substantially rigid upper plate 40 a at the windowsurface. The exciter 38 thus receives the pulse from the piezoelectricactuating device 36 and imparts a corresponding and amplified pulse orstroke or movement in a direction that is generally normal to the pulseor stroke of the piezoelectric actuating device 36. The generallylateral or cross car pulse of the piezoelectric actuating device is thusconverted into an outward and inward pulse at the lower portion of thewindow panel to cause the window panel to move outward and inward aboutthe generally fixed upper perimeter portion of the window panel. Theexciter thus takes the generally horizontal force and stroke of thepiezoelectric actuating device and redirects it and amplifies the stroketo a generally vertical or partially vertical stroke at the window panelwhile reducing the force output of the actuating device to a reducedgenerally vertical or partially vertical force at the window panel, soas to cause the window panel to move inward and outward or vibrate atthe desired frequency as dictated by the audio system and thepiezoelectric actuating device.

The upper and/or lower mounting or attaching or interface members orplates of the exciter assembly are substantially rigid or stiff andsubstantially non-flexible, such as having a flexibility of, forexample, about 1×10⁻⁷ mm/N or thereabouts. Optionally, the mechanicalexciter assembly may be coated or impregnated with an adhesive or othersuitable coating material to enhance the stiffness of the components orelements and to environmentally protect the components or elements andthe assembly, and to fill in any microcracks or the like in theindividual components or elements or assembly.

Optionally, other forms or types of exciters or force/pulse transferdevices may be implemented in conjunction with the actuating devicewithout affecting the scope of the present invention. For example, andas shown in FIGS. 18A-19, an actuating assembly 24′ may include anexciter 38′ having an upper plate 40 a′, a lower plate 40 b′, a pair ofgenerally central plates or rods or members 42′ and a plurality of ribs44′ pivotally connected to the central plate 42′ and upper/lower plates40 a′, 40 b′. A piezoelectric actuating device 36′ is operable to imparta longitudinal vibratory motion of the central plate 42′, which in turnimparts a transverse vibratory motion of the upper/lower plates 40 a′,40 b′ via flexing of the ribs 44′, such as in a similar manner asdescribed above.

In the illustrated embodiment, and as best shown in FIG. 20, the ribs44′ are formed from a single or unitary stamping or element 45′ thatdefines or provides a plurality of central rib portions 44 b′ andmounting portions 44 a′ at opposite ends of each central rib portion 44b′. The mounting portions 44 a′ are bent relative to the central portion44 b′, such that the mounting portions may be generally parallel to oneanother and parallel to the central plate 42′ and the respective upperor lower plate 40 a′, 40 b′, with the central rib portions 44 b′ beingat an angle therebetween. The central rib portions 44 b′ may comprise asubstantially rigid or non-flexing portion, and may include additionalmaterial or structures or flaps 44 c′ folded over or established at thecentral rib portions such as in a similar manner as described above,while the bend area at the junction of the central rib portions 44 b′and the mounting portions 44 a′ may flex during operation of theactuating assembly to allow for translation of a lateral or generallyhorizontal movement of the central plate 42′ to a generally verticalmovement of the upper or lower plate 40 a, 40 b′, such as discussedabove.

In the illustrated embodiment, the mounting portions 44 a′ include tabs44 d′ extending therefrom that are bent relative to the respective endportion 44 a′ to assist in locating and attaching the rib 44′ to thecentral plate 42′ and the upper or lower plate 40 a′, 40 b′. Forexample, and as can be seen in FIG. 19, the tabs 44 d′ may be wrappedaround the side edges of the central plate 42′ and respectiveupper/lower plate 40 a′, 40 b′. As can also be seen in FIG. 19, the ribelements 45′ may be staggered such that the tabs 44 d′ of one elementare longitudinally offset from the tabs 44 d′ of the other element,while the ribs 44′ are generally aligned along the central plate 42′.The tabs 44 d′ may be wrapped around the side edges of the central plate42′ and upper/lower plate 40 a′, 40 b′, or may be inserted throughapertures or received in channels or notches formed along the plates 40a′, 40 b′, 42′ and may be bent along the opposite surface of therespective plate, such as shown in FIG. 18A, and may be secured thereatto limit or substantially preclude longitudinal movement of the ribelement relative to the respective plates of the exciter assembly ordevice.

Optionally, the ribs may also or otherwise be attached to the respectiveplates via other suitable attaching means, such as welding or solderingor adhering or bonding or the like, while remaining within the spiritand scope of the present invention. Optionally, for example, and withreference to FIG. 21, a rib element 45″ may be formed to provide aplurality of rib portions 44″ along and between the central plate andone of the upper and lower plates. As can be seen in FIG. 21, ribelement 45″ defines or provides a plurality of central rib portions 44b″ and mounting portions 44 a″ at opposite ends of each central ribportion 44 b″. The mounting portions 44 a″ are bent relative to thecentral portion 44 b″, such that the mounting portions may be generallyparallel to one another and parallel to the central plate 42″ and therespective upper or lower plate 40 a″, 40 b″, with the central ribportions 44 b″ being at an angle therebetween. The central rib portions44 b″ may comprise a substantially rigid or non-flexing portion, and mayinclude additional material or structures or flaps 44 c″ folded over orestablished at the central rib portions such as in a similar manner asdescribed above, while the bend area at the junction of the central ribportions 44 b″ and the mounting portions 44 a″ may flex during operationof the actuating assembly to allow for translation of a lateral orgenerally horizontal movement of the central plate to a generallyvertical movement of the upper or lower plate, such as discussed above.In the illustrated embodiment, the mounting portions 44 a″ of the ribelement 45″ provide substantially planar mounting portions that mayengage the opposed surfaces of the respective plates, and that may besecured or retained along the respective plates to limit longitudinalmovement of the rib element relative to the plates, such as via weldingor soldering or otherwise fastening or attaching or securing the ribelement to the plates.

Optionally, other forms of actuating assemblies and/or exciters may beimplemented to provide a non-flexing vibratory force or vibrationalforce at the inner surface of the window panel while remaining with thespirit and scope of the present invention. For example, an exciter maynot include a fishbone configuration of ribs and plates, but may includea flexible element or elements that are affixed to an upper plate and alower plate and that flex to move the upper plate toward and away fromthe lower plate in response to the actuating device. Such aconfiguration may provide enhanced assembly and manufacturing processesby reducing welds and crimps and the like during the assembly process ofthe exciter device or assembly.

For example, and with reference to FIGS. 22-24, an exciter assembly 138comprises an elongated, substantially rigid upper member or upper plate140 a and an elongated, substantially rigid base or lower member orlower plate 140 b and a plurality of flexible elements or plates 142that extend between the plates 140 a, 140 b and that engage therespective end faces 136 a of the piezoelectric actuating device 136. Inthe illustrated embodiment, the flexible elements 142 comprise stampedor extruded forms that are arranged side-by-side across the base orlower plate 140 b of the exciter assembly 138, with one end of each formor element being attached to the lower plate 140 b and the other end ofeach form or element being attached to the upper plate 140 a.

In the illustrated embodiment, and as best shown in FIG. 24, eachflexible element 142 is a generally parallelogram-shaped form or elementthat has an upper portion 142 a, a lower portion 142 b and angled sideportions 142 e. The flexible element 142 includes opposite receivingportions 142 d, 142 e at a central region thereof for receiving theopposite ends of the actuating device 136 therein. As can be seen inFIG. 24, one receiving portion 142 d is formed with the upper portion142 a, while the other receiving portion 142 e is formed with the lowerportion 142 b. The flexible element also includes an aperture 142 f ateach of the receiving portions 142 d, 142 e. A flexible orcompressible/expandable mounting element or portion 142 g, 142 h isformed at each end of the flexible element 142 for mounting to one ofthe upper/lower plates 140 a, 140 b. For example, and with reference toFIG. 24, the left end mounting element 142 g is secured to the lowerplate 140 b (such as via a suitable fastener or pin or post or thelike), while the right end mounting element 142 h is secured to theupper plate 140 a (such as via a suitable fastener or pin or post or thelike).

When the exciter assembly is assembled, the flexible elements (such asfour similarly formed flexible elements or more or less depending on theparticular application) are arranged in an alternating fashion next toone another (such as with the laterally outboard flexible elements beingarranged in one manner and the inboard flexible elements being arrangedin the other or opposite manner or otherwise alternatingly arranged asdesired), as can be seen in FIG. 22, such that one end of one element isattached to the base or lower plate 140 b, while the corresponding endof an adjacent element is attached to the upper plate 140 a. Theflexible elements 142 may be pinned or joined or connected together viaa pin 143 inserted through the apertures 142 f at each of the receivingportions 142 d, 142 e. When assembled together, the receiving portionsof the flexible elements define or form a receiving pocket for receivinga respective end of the actuating device 136 therein. In the illustratedembodiment, the actuating device 136 may have an engaging element orportion 146 at each end that is formed to be received in the receivingpocket of the respective receiving portions to substantially retain theends of the actuating device relative to the flexible elements.

Thus, the flexible elements may be arranged between the upper and lowerplates and may flex in response to the pulsation of the actuating deviceto cause a relative motion of the upper plate toward and away from thelower plate or base of the exciter. During operation of the actuatingdevice, the actuating device pulses or vibrates via extension andretraction of the ends along the longitudinal axis of the upper andlower plates 140 a, 140 b. Such extension of the actuating device causesthe upper element or portion 142 a to move away from the lower elementor portion 142 b of the flexible element to thus vibrate or pulse theupper plate 140 a relative to the lower plate 140 b. As can be seen withreference to FIG. 24, movement of receiving portion 142 d toward theleft side of FIG. 24 pulls at mounting element 142 h, which flexes toallow for such movement, while movement of receiving portion 142 etoward the right side of FIG. 24 similarly pulls at mounting element 142g, which flexes to allow form such movement. As the parallelogram formor shape is moved in this manner, the upper and lower portions 142 a,142 b move toward and away from each other to vibrate or pulse the upperplate 140 a relative to lower plate 140 b. Because of the alternatingarrangement of the flexible elements across the exciter assembly, thepulsing motion or action is substantially uniform across the upper plateto provide a substantially uniform vibration of the upper plate (andthus of the window panel) relative to the lower plate or base (and thusthe vehicle body or frame or sheet metal), without movement in thelongitudinal direction along the upper and lower plates. As can be seenin FIG. 27, the vehicle body or frame or sheet metal 112 a may be formedto provide a platform or mounting structure or surface 112 b forattaching the lower plate or base 140 b of exciter assembly 138, andwhereby the platform or mounting structure or surface may besubstantially rigid to limit vibration or movement or flexing of thelower plate 140 b of exciter assembly 138 relative to the vehicle bodyor frame or sheet metal, such as in a similar manner as discussed above.

Optionally, other flexible element configurations and shapes may beimplemented that may convert a longitudinal pulsation and force to amovement and force that is generally normal to the longitudinaldirection. For example, and with reference to FIGS. 28-30, an exciterassembly 138′ comprises an elongated, substantially rigid upper sidemember or upper plate 140 a′ and an elongated, substantially rigid lowerside member or lower plate 140 b′ and a plurality of flexible elementsor plates 142′ that extend between the plates 140 a′, 140 b′ and thatengage the respective end faces of the piezoelectric actuating device136′. Similar to flexible elements 142, discussed above, the flexibleelements 142′ comprise stamped or extruded forms (such as aparallelogram form or shape) that are arranged side-by-side across thebase or lower plate 140 b′ of the exciter assembly 138′, with one end ofeach form or element being attached to the lower plate 140 b′ and theother end of each form or element being attached to the upper plate 140a′. Also similar to exciter assembly 136, discussed above, the flexibleelements 142′ (such as four similarly formed flexible elements or moreor less depending on the particular application) may be arranged in analternating manner across the base or lower plate and the upper plate ofthe exciter assembly 136′ are arranged in an alternating fashion next toone another (such as with the laterally outboard flexible elements beingarranged in one manner and the inboard flexible elements being arrangedin the other or opposite manner).

In the illustrated embodiment, each flexible element 142′ includes anupper portion 142 a′, a lower portion 142 b′ and angled side portions142 c′. The flexible element 142′ includes opposite actuator attachingportions 142 d′, 142 e′ at a central region thereof for attaching to theopposite ends of the actuating device 136 of the actuating assembly124′. As can be seen in FIG, 30, one attaching portion 142 d′ is formedwith the upper portion 142 a′, while the other attaching portion 142 e′is formed with the lower portion 142 b′. The flexible element alsoincludes an aperture 142 f at each of the receiving portions 142 d′, 142e′ for receiving a pin 143′ (FIGS. 28 and 29) therethrough to join theflexible elements together and to join or retain the ends of theactuating device relative to the flexible elements. A flexible orcompressible/expandable mounting element or portion 142 g′, 142 h′ isformed at each end of the flexible element 142′ for mounting to one ofthe upper/lower plates 140 a′, 140 b′. For example, and with referenceto FIG. 30, the left end mounting element 142 g′ is secured to the lowerplate 140 b′ (such as via a suitable fastener or pin or post or thelike), while the right end mounting element 142 h′ is secured to theupper plate 140 a′ (such as via a suitable fastener or pin or post orthe like). The actuating assembly 124′ and exciter assembly 138′ may beotherwise substantially similar in assembly and operation as actuatingassembly 124 and exciter assembly 138, discussed above, such that adetailed discussion of the actuating assemblies and exciter assembliesneed not be included herein.

Optionally, other forms of exciter assemblies may be implemented,including exciter assemblies that convert the vibrational forcesprovided by an actuating device that is arranged generally normal to theupper and lower plates or members of the exciter assembly. For example,and with reference to FIGS. 31 and 32, an exciter assembly 238 mayinclude an upper or window panel engaging plate or member 240 a and abase or lower plate 240 b, with a flexible element 242 disposedtherebetween and farmed unitarily therewith. In the illustratedembodiment, flexible element 242 includes a receiving portion 242 a thatreceives an actuating device (not shown in FIGS. 31 and 32) therein suchthat one end of the actuating device engages and acts against a baseactuating portion 242 b and the other end of the actuating deviceengages and acts against an opposite actuating portion. 242 c. Flexibleelement or portion 242 further includes ribs or arms or structures 242 dthat extend between the upper and lower plates or members and thatextend from the actuating portion 242 c. As can be seen with referenceto FIG. 32, extension of the actuating device causes actuating portion242 c to be moved away from actuating portion 242 b, which, in turncauses flexing of the flexible anus to impart a greater stroke at theupper plate 240 a than the stroke of the actuating device. Variousstructures or arrangements of flexible arms or elements or ribs may beutilized to provide an increase or amplification of the stroke of theactuating device while providing a reduction in the force output of theupper plate at the window panel as compared to the force output by theactuating device, while remaining within the spirit and scope of thepresent invention.

Optionally, the actuating device and exciter assembly may include apreloading element to preload or bias the engaging elements of theactuating device (such as engaging elements 146 of the actuating device136) inward or toward one another so as to apply a force toward each endof the actuating device. In the illustrated embodiment, the biasingelement or preloading element comprises a curved spring element orbiasing element 150 (FIG. 33) that is attached or affixed to arespective side of each of the engaging elements 146. For example, thebiasing element 150 may be adhesively affixed to the engaging elementsor mechanically affixed to the engaging elements or otherwise affixed orattached to the sides of the engaging elements. Thus, the upper andlower plates and engaging elements and biasing elements function tosubstantially encompass or contain or “box-in” the actuating device toassist in securing the actuating device in the appropriate orientation(with its actuating forces being longitudinally directed along andgenerally parallel to the upper and lower plates) during operation ofthe actuating device.

The biasing element may be configured such that when it is affixed tothe engaging elements at the actuating device 136, the biasing element150 urges the engaging elements 146 toward one another and toward andinto engagement with the ends of the actuating device. For example, thebiasing element may initially be extended or stretched (such as byinserting a spacer or shim within the curved portion 150 a of thebiasing element) when its attaching ends 150 b are affixed to theengaging elements 146, whereby removal of the spacer or shim (such asafter the adhesive cures or after the attaching ends are otherwisesecured to the engaging elements) allows the biasing element to flexinward and pull at the engaging elements to preload the actuatingdevice. Optionally, one biasing element may be implemented along aselected side of the exciter assembly, but it is desirable that a secondbiasing element (such as shown in FIG. 33) be similarly mounted to oraffixed to the engaging elements at the other side of the actuatingdevice to provide balanced biasing of the engaging elements toward oneanother.

Although shown and described as having a small curved portion 150 a andelongated mounting portions or attaching ends 150 b, otherconfigurations of biasing elements may be implemented depending on theparticular application of the window system. For example, and withreference to FIG. 34, a biasing element 150′ may comprise oppositemounting portions or attaching ends 150 b′ and an arcuate-shaped centralportion 150 a′ extending substantially along the length of the actuatingdevice. Other sized or shaped spring elements or curved portions of abiasing element may be suitable for biasing or preloading the actuatingdevice, while remaining within the spirit and scope of the presentinvention.

The biasing element or spring is intended to insure a pre-load on thepiezo actuating device throughout the functional cycle of the actuatingdevice and to provide longitudinal stiffness and structural rigidity tothe piezo actuating device assembly. The biasing elements thus maintaincompression on the actuating device at the ends of the actuating deviceduring the range of extension and retraction of the actuating device.The biasing elements and engaging elements and upper and lowerattachment plates or elements generally surround the actuating device toassist in maintaining longitudinal alignment of the actuating deviceduring operation of the actuating device. The actuating device, whichmay otherwise generally float between the engaging elements, is thusretained generally in its longitudinal orientation during operation, andany tilting of the actuating device during operation may be limited orsubstantially precluded by the presence of the engaging elements andbiasing elements (so that the forces exerted by the actuating deviceduring operation of the actuating device are directed longitudinallyalong the exciter assembly and not angled or canted or misaligned due totilting of the actuating device).

Optionally, the exciter assembly may include a spring element or biasingelement or tensioning element at the end or ends of the exciter assemblydistal from the actuating device, to bias or urge the exciter assemblytoward its compressed state. For example, and as shown in FIG. 35, abiasing element 152 may be disposed at the ends of the upper plate 340 aand lower plate 340 b of an exciter assembly 310 to urge the upper andlower plates toward one another, whereby actuation of the actuatingdevice 136 pushes against the center plate or rod 342 to expand orseparate the upper and lower plates (via the diagonals or ribs 144),such as in a similar manner as discussed above. In the illustratedembodiment, the biasing element 152 comprises an arcuate metallicelement that is attached to the ends of the upper and lower plates.

Optionally, the degree of tension of the biasing element and/or thedegree of movement of the upper plate relative to the lower plate may beselectively set or adjusted to achieve the desired functionality of theactuating assembly. For example, and with reference to FIG. 36, thebiasing element 152 may include a threaded fastener or adjuster 154therethrough. The threaded fastener 154 may be rotated to adjust therange of motion of the upper plate 340 a relative to the lower plate 340b and/or to adjust the degree of tension applied by the biasing element152.

The springs or biasing elements on either end of the exciter assemblymay limit or inhibit rocking of the exciter assembly (where one side orend may be moving upward while the other side or end is movingdownward). Desirably, the exciter assembly functions with the upper andlower beams or plates remaining parallel or substantially parallelthroughout the operating cycle. Allowing for tightening or adjusting ofthe biasing elements or springs allows for inducing a pre-load into thepiezoelectric actuator (such as in a similar manner as biasing element150, discussed above). For example, as the springs are tightened, theexciter will exert more load back into the piezoelectric actuator, andas the springs are loosened, the preload will be relieved. This mayallow for enhanced tuning or adjustment of the preload level in theexciter assembly depending on the particular application of the actuatorassembly.

Optionally, it is envisioned that other forms of biasing elements may beimplemented along or at the ends of the upper and lower plates. Forexample, a biasing element 152′ may have an adjuster 154′ as shown inFIG. 37. Optionally two or more biasing elements 152″ (FIG. 38) may bedisposed at respective ends of the upper and lower plates 340 a″, 340b″, with each biasing element 152″ having a respective adjuster 154″. Asshown in FIG. 38, the biasing element or elements may be disposed alongthe upper and lower plates inboard of the outer ends of the plates.Other biasing element and/or adjuster configurations may be implementedwhile remaining within the spirit and scope of the present invention.

Although shown and described as having a piezoelectric actuator thatpushes against the center rod to impart a movement of the upper plateaway from the lower plate (via movement and/or flexing of the diagonalribs), it is envisioned that the actuating assembly may otherwise impartmovement of the upper plate away from and toward the lower plate, whileremaining within the spirit and scope of the present invention. Forexample, and with reference to FIGS. 39A and 39B, an exciter device 438includes an upper plate 440 a, a lower plate 440 b and a center rod orplate 442 interconnected by a plurality of ribs 444 (such as ribssimilar to ribs 144 discussed above). The center plates 442 may attachto or extend from a central actuating housing or support structure 445that substantially supports and/or encompasses the actuating device(such as a piezoelectric actuator or the like).

In the illustrated embodiment, the ribs 444 are arranged in a generallyopposite direction as ribs 144 (discussed above) are arranged, so thatthe upper plate is moved away from the lower plate when the actuatingdevice is retracted and is moved toward the lower plate when theactuating device is extended. The exciter device may otherwise besubstantially similar to the exciter devices discussed above (andoptionally may include one or more biasing elements at the side or sidesor ends of the upper and lower plates, such as discussed above), suchthat a detailed description of the exciter devices and actuatingassemblies need not be repeated herein.

Thus, the exciter assemblies of the present invention provide a rigidinterface element or member disposed at and secured or adhered or bondedto the window panel to provide a substantially uniform vibratory forceat the window panel. The exciter assembly is formed to provide anincreased stroke as compared to the stroke of the actuating device.Optionally, the exciter assembly may translate or convert a longitudinalforce and stroke along a longitudinal axis of the exciter assembly to agenerally transverse force and stroke in a direction generallytransverse to the longitudinal axis of the exciter assembly, and thusgenerally normal to the plane or surface of the window panel at thelocation at which the upper member or plate is secured to the innersurface of the window panel. Thus, the exciter assembly of the presentinvention is configured to provide a substantially uniform vibratorymotion and force at the inner surface of a perimeter region of a windowpanel in response to a pulsation output of an actuating device, such asa piezoelectric actuating device or the like.

In the illustrated embodiments, the actuating assemblies are configuredfor attaching to a lower perimeter portion or region of a rear window orbacklite of a vehicle so as to vibrate the rear window or backlite atthe desired frequencies. Optionally, the actuating assembly may beadapted or configured for application at one or more other windows of avehicle, such as, for example, a side window or side fixed window of thevehicle or a sunroof or moonroof of the vehicle or a rear window of astation wagon or van or minivan or SUV or the like (where the window andactuating assembly may be part of a rear door or liftgate or tailgate ofthe vehicle) or a windshield of the vehicle, while remaining within thespirit and scope of the present invention. Optionally, it is envisionedthat aspects of the present invention may be utilized for other vehiclepanels and/or may be utilized on non-vehicular glass or window panelapplications or non-vehicular panel applications.

Optionally, the window assembly may be installed in the vehicle as amodule or unit (including the window panel and actuating assembly andperimeter frame/seal portions) or the acoustical window assembly orsystem may be delivered to a vehicle assembly plant as components wherethe components may be assembled at the assembly plant or facility.Optionally, for example, the actuating assemblies (including theactuating device and exciter device or assembly) and the perimeter frameor seal may be mounted to a carrier that may be installed into thevehicle as a separate part during one assembly process, and with thewindow panel being installed as a separate assembly process, such as,for example, with the window panel being installed in a similar manneras currently done with conventional windows.

For example, and with reference to FIGS. 40-42, an acoustic windshieldassembly 510 may include a modular actuating assembly or device 515 thatis mountable or attachable to the vehicle frame or structure 512 a of avehicle 512, such as a frame or structure 512 a at a forward end of thevehicle cabin for supporting the windshield 514 of the vehicle 512. Themodular actuating assembly 515 includes a frame portion 516, one or moreactuating assemblies 524 and a carrier element or support element 525that mounts the actuating assembly or assemblies 524 to or at the frameportion 516. Frame portion 516 includes an upper frame portion ormounting portion 516 a for generally fixedly mounting the upperperimeter portion of the window panel or windshield to the vehicle sheetmetal and a pair of side frame portions or mounting portions 516 b and alower frame portion or mounting portion 516 c for movably or vibratablymounting the side and lower portions of the window panel or windshieldto the vehicle sheet metal.

In the illustrated embodiment, the carrier element 525 is disposed alongthe lower frame portion 516 c and locates the actuating assembly 524(including the exciter assembly 538 and actuating device orpiezoelectric actuator) at or near the lower perimeter region of thewindshield and at a location at or near the dashboard that is notreadily viewable by a person viewing the windshield of the vehicle. Thecarrier element may be adhered to or bonded to or otherwise affixed tothe mounting portion 526 (FIG. 41) of the lower frame portion 516 c ormay be integrally molded with the mounting portion of the lower frameportion 516 c. As shown in FIG. 41, the carrier element 525 may extendfrom the frame portion 516 c and may be adhered or mounted to thevehicle structure 512 a, and may include one or more projections orstand-offs 525 a for spacing a bonding surface of the carrier element adesired or appropriate distance from the vehicle structure for enhancingthe bond between the adhesive and the frame portion and vehiclestructure. The lower plate 540 b of exciter assembly 538 may be attachedto or received in or otherwise affixed relative to the carrier element525 to secure the exciter assembly to the carrier element and thus tothe vehicle structure when the carrier element is mounted to the vehiclestructure.

The modular actuating device 515 thus is attachable or mountable to avehicle frame or sheet metal or structure. After the modular actuatingdevice 515 is secured to the vehicle structure, the window panel orwindshield 514 (as shown in FIG. 42) may be adhered to or bonded to ormounted to the outer attachment elements 528 of the frame portion 516and the outer or upper plate or plates 540 a of the exciter assembly 538to seal the windshield to the vehicle and to the actuating device 515.The exciter assembly and actuating device and frame portions mayotherwise be substantially similar to those described above such that adetailed discussion of the exciter assemblies and actuating devices andframe portions need not be repeated herein.

Thus, the modular actuating device 515 may be readily attached oradhered or fastened to the vehicle frame or sheet metal at theautomobile assembly plant, such as by dispensing a bead of adhesive atthe vehicle structure and/or at the mounting portions 526 of the frameportions and at the carrier element 525 and affixing the frame portion516 and carrier element 525 to the vehicle structure. Optionally, themodular actuating device 515 may include reinforcement elements 527,such as cross members or corner members or the like, for providingenhanced structural rigidity to the assembly or device prior to andduring installation of the modular actuating device 515 at the vehiclestructure. The reinforcement elements 527 may be molded with the frameportions or attached thereto, and may be readily removed from the frameportions after the modular actuating device is installed or attached tothe vehicle structure. After the modular device is adhered or attachedto the vehicle structure and the reinforcement elements have beenremoved from the module, the window or windshield may be attached oradhered to the frame portions and exciter assembly, such as in a similarmanner as described above.

For applications at the vehicle windshield, it is preferred to limitoutward movement of the windshield to meet impact requirements forvehicles. Thus, an impact limiting element or outward movement elementmay be implemented at the windshield (such as at the lower portion orlower corners of the windshield) to allow for movement or pulsing orvibrating of the windshield while limiting outward movement of thewindshield when the windshield is impacted by an object moving forwardlywith respect to the vehicle. Such an impact limiting element may beattached to either the windshield or the vehicle frame or sheet metaland movably attached to the other of the windshield or vehicle frame orsheet metal so as to allow for relative movement between the windshieldand vehicle frame while limiting outward movement of the windshieldrelative to the vehicle frame, such as by utilizing aspects of theelements described in PCT Application No. PCT/US06/40100, filed Oct. 12,2006 and published Apr. 26, 2007 as International Publication No. WO2007/047442; which is hereby incorporated herein by reference in itsentirety.

Thus, the present invention provides an acoustical window assembly for avehicle, and may be implemented at a front windshield or rear window orfixed side window or fixed side door window or sunroof or moonroof ofthe vehicle. The acoustical window assembly and actuating device isoperable to vibrate the window panel of the window to produce audiblesound so as to replace or supplement one or more speakers of thevehicle. The acoustical window assembly of the present invention may beoperable to achieve high Sound Pressure Levels (SPL) for relatively lowacoustic strength with a reduced stroke or travel of the window panelduring operation of the actuating device. For example, the presentinvention, when implemented and tested on an exemplary vehiclewindshield, has been unexpectedly found to be capable of achieving anSPL of about 110 dB at about 30-120 Hz and, for an acoustic windshield(given an area of about 0.6 m2), may be capable of achieving such an SPLwith a stroke of about 300-400 μm or thereabouts. Such a small degree ofstroke or travel of the window panel is not readily discernible to aperson viewing the window panel or windshield during operation of thesound system of the vehicle. Also, the functionality and sound qualityof the window assembly is not substantially adversely effected bycontact of an object or person's hand or the like against the vibratingwindow panel or windshield.

Accordingly, the actuating assembly of the acoustic window assembly ofthe present invention utilizes a mechanical exciter or amplifying deviceto excite or vibrate the window panel in the desired direction and at adesired force and degree of vibration in response to the output of thepiezoelectric actuating device. The mechanical exciter provides asubstantially rigid interface member or plate that acts against thewindow panel along a portion or region of the window panel and at alower region of the window panel so that the actuating assembly may belocated at a region where it is not readily viewable by a person viewingthe window panel from inside or outside of the vehicle cabin.

Thus, the present invention provides for use of the existing large,double-curved glass (or other suitable materials) substrates or surfaces(such as a curved windshield or rear backlite or side window or thelike) in a vehicle as loudspeaker membranes. The actuating assemblyfunctions to excite or vibrate the panel with an actuator using apiezo-ceramic driver mounted at the rim (or belt-line) of the windowpanel. Installation of the actuating device thus may require a reducedvolume or small volume compared to other known systems for low frequencysound production. Also, a high efficiency can be achieved by the use ofthe piezo material and the good vibro-acoustic coupling achieved by theacoustic window assembly of the present invention.

The performance of the acoustic window assembly of the present inventionis not so highly dependent on the precise location of the actuatingassembly at the vehicle window panel, such that elongated actuators maybe set in the general or desired position along the window panels. Thepresent invention thus enables the acoustic window assemblies to bemanufactured in production quantities without requiring testing of eachindividual window assembly to determine if the actuating assembly isattached to the window panel at a precise location requirement (such asa central region of the panel as is typically required for prior artvibrating panels). The size and spacing of the actuating assembly andmechanical exciter are selected so as to provide the desired degree offorce and stroke at the window panel so as to provide the desired orappropriate frequency of vibration of the window panel as dictated ordriven by the audio system of the vehicle, without moving the windowpanel beyond the limitations or constraints of the window frame portionand/or the vehicle frame.

Therefore, the present invention provides an acoustic window assemblyfor a vehicle that substantially uniformly vibrates the window panel(with substantially non-flexing or non-bending vibration via thesubstantially rigid interface members or elements or plates) whilesubstantially sealing the window panel at the vehicle. The presentinvention provides an enhanced acoustical device for a vehicle soundsystem that utilizes a glass panel or window panel of a vehicle and thusdoes not interfere with the interior space of the vehicle cabin and/orother space at the cabin that may be utilized for other vehiclecomponents or the like. The actuating assembly of the acoustic windowassembly of the present invention includes an actuating device, such asa piezoelectric actuating device or the like, and a mechanical exciter,which engages the window panel and transfers the pulse of the actuatingdevice along a region of the window panel (and via a substantially rigidinterface member or plate to limit or substantially preclude non-uniformforces and vibrations at the window panel) to spread out the forces andmovements/pulses at the window panel.

Because the acoustic window assembly of the present invention utilizesthe existing window panel of the vehicle and may replace or supplementone or more speakers and/or subwoofers of a vehicle sound system, theacoustic window assembly may achieve a reduction in the weight of thevehicle, since the addition of the actuator assembly is more than offsetby the reduction or removal of one or more speakers and/or subwoofers ofthe sound system. The acoustic window assembly of the present inventionthus may provide a weight reduction and may require reduced space, andmay require reduced power to operate, while providing enhancedperformance of the acoustic window assembly and enhanced sealing of thewindow panel at the vehicle.

Changes and modifications to the specifically described embodiments maybe carried out without departing from the principles of the presentinvention, which is intended to be limited only by the scope of theappended claims as interpreted according to the principles of patentlaw.

1. A window assembly for a vehicle, said window assembly comprising: awindow panel; a frame portion disposed partially around a perimeter ofsaid window panel and not disposed at a free perimeter portion of saidwindow panel; and an actuating assembly, said actuating assembly beingpositioned at or near said free perimeter portion of said window panel,said actuating assembly being operable to vibrate said window panel. 2.The window assembly of claim 1, wherein said frame portion fixedlysecures a fixed perimeter portion of said window panel at the vehicle,and wherein said window assembly is configured to allow flexing alongother perimeter portions of said window panel between said fixedperimeter portion and said free perimeter portion.
 3. The windowassembly of claim 2, wherein said fixed perimeter portion issubstantially opposite from said free perimeter portion.
 4. The windowassembly of claim 1, wherein said window panel comprises one of a rearwindow of a vehicle, a rear liftgate window of a vehicle, a windshieldof a vehicle, a side window of a vehicle, and a side door window of avehicle, and wherein said free perimeter portion of said window panelcomprises a lower perimeter region of said window panel.
 5. The windowassembly of claim 1, wherein said actuating assembly comprises apiezoelectrical actuator that is operable to vibrate at or near saidfree perimeter portion of said window panel.
 6. The window assembly ofclaim 5, wherein said piezoelectrical actuator is operable to excite anexciter device that converts the vibration of said piezoelectricalactuator to a desired vibration or movement at said window panel.
 7. Thewindow assembly of claim 6, wherein said desired vibration comprisesmovement of said exciter device toward and away from said window panelto impart an inward movement and an outward movement of said windowpanel at said free perimeter portion of said window panel,
 8. The windowassembly of claim 7, wherein said piezoelectrical actuator is orientedto impart movement in a direction generally along said window panel andsaid exciter device imparts movement in a direction generally normal tosaid window panel in response to said piezoelectrical actuator.
 9. Thewindow assembly of claim 8, wherein said exciter device includes (i) amounting plate for attaching to the vehicle, (ii) a window attachingplate for attaching to said window panel, and (iii) an exciter elementthat imparts movement of said window attaching plate toward and awayfrom said mounting plate in response to said piezoelectric actuator. 10.The window assembly of claim 7, wherein a seal is disposed along saidfree perimeter portion of said window panel and substantially seals saidwindow panel at the vehicle during the movement or vibration of saidwindow panel.
 11. The window assembly of claim 1, wherein said frameportion comprises a window frame portion attached at said perimeter ofsaid window panel and a vehicle frame portion attached at the vehicle,and wherein said window frame portion is movable relative to saidvehicle frame portion.
 12. The window assembly of claim 11 including alimiting element that limits outward movement of said window panelrelative to said vehicle frame portion.
 13. The window assembly of claim12, wherein said limiting element is substantially fixedly attached atan interior surface of said window panel and is configured to be movablyattached to said vehicle frame portion with a frame engaging portionthat limits outward movement of said window panel relative to saidvehicle frame portion.
 14. The window assembly of claim 11, comprising amounting portion for mounting a perimeter portion of said window panelto said vehicle frame portion, said mounting portion including aflexible element to allow for movement of said perimeter portion of saidwindow panel toward and away from said vehicle frame portion.
 15. Thewindow assembly of claim 14, wherein said flexible element comprises atleast one elongated generally U-shaped flexible element disposed betweensaid window panel and said vehicle frame portion.
 16. The windowassembly of claim 15, wherein said flexible element is configured toallow movement of said window panel in a direction toward and away fromsaid vehicle frame portion while limiting movement in a direction alongsaid vehicle frame portion.
 17. A window assembly for a vehicle, saidwindow assembly comprising: a window panel; a frame portion disposedpartially around a perimeter of said window panel and not disposed at afree perimeter portion of said window panel; wherein said frame portionfixedly secures a fixed perimeter portion of said window panel at thevehicle, and wherein said fixed perimeter portion is substantiallyopposite from said free perimeter portion, and wherein said windowassembly is configured to allow flexing along other perimeter portionsof said window panel between said fixed perimeter portion and said freeperimeter portion; wherein said window panel comprises a rear window ofa vehicle, and wherein said free perimeter portion of said window panelcomprises a lower portion of said window panel and said fixed perimeterportion of said window panel comprises an upper portion of said windowpanel; and an actuating assembly, said actuating assembly beingpositioned at or near said free perimeter portion of said window panel,said actuating assembly being operable to vibrate said window panel. 18.The window assembly of claim 17, wherein said actuating assemblycomprises a piezoelectrical actuator that is operable to vibrate at ornear said free perimeter portion of said window panel, and wherein saidpiezoelectrical actuator is operable to excite an exciter device thatconverts the vibration of said piezoelectrical actuator to a desiredvibration or movement at said window panel.
 19. The window assembly ofclaim 18, wherein said piezoelectrical actuator is oriented to impartmovement in a direction generally along said window panel and saidexciter device imparts movement in a direction generally normal to saidwindow panel in response to said piezoelectrical actuator.
 20. Thewindow assembly of claim 17, comprising a mounting portion for mountinga perimeter portion of said window panel to a vehicle frame portion thatis attached at the vehicle, said mounting portion including a flexibleelement to allow for movement of said perimeter portion of said windowpanel toward and away from said vehicle frame portion, and wherein saidflexible element comprises at least one elongated generally U-shapedflexible element disposed between said window panel and said vehicleframe portion.
 21. A window assembly for a vehicle, said window assemblycomprising: a window panel; a frame portion disposed partially around aperimeter of said window panel and not disposed at a free perimeterportion of said window panel; wherein said frame portion fixedly securesa fixed perimeter portion of said window panel at the vehicle, andwherein said fixed perimeter portion is substantially opposite from saidfree perimeter portion, and wherein said window assembly is configuredto allow flexing along other perimeter portions of said window panelbetween said fixed perimeter portion and said free perimeter portion;wherein said window panel comprises a rear window of a vehicle, andwherein said free perimeter portion of said window panel comprises alower portion of said window panel and said fixed perimeter portion ofsaid window panel comprises an upper portion of said window panel; anactuating assembly, said actuating assembly being positioned at or nearsaid free perimeter portion of said window panel, said actuatingassembly being operable to vibrate said window panel; and a seal alongsaid free perimeter portion to substantially seal said window panelrelative to the vehicle while allowing movement of said window panel inresponse to said actuating assembly.
 22. The window assembly of claim21, wherein said actuating assembly comprises a piezoelectrical actuatorthat is operable to vibrate at or near said free perimeter portion ofsaid window panel, and wherein said piezoelectrical actuator is operableto excite an exciter device that converts the vibration of saidpiezoelectrical actuator to a desired vibration or movement at saidwindow panel, and wherein said piezoelectrical actuator is oriented toimpart movement in a direction generally along said window panel andsaid exciter device imparts movement in a direction generally normal tosaid window panel in response to said piezoelectrical actuator.
 23. Thewindow assembly of claim 21, comprising a mounting portion for mountinga perimeter portion of said window panel to a vehicle frame portion thatis attached at the vehicle, said mounting portion including a flexibleelement to allow for movement of said perimeter portion of said windowpanel toward and away from said vehicle frame portion, and wherein saidflexible element comprises at least one elongated generally U-shapedflexible element disposed between said window panel and said vehicleframe portion.